fix: App Navigation Overhual

[HamzaIsrar12]

Description

LEARNER-9613

• Course Unit Navigation Indicator
• Download icon fluctuation on downloaded video deletion
• Retain section visibility on refresh
• Handle back press on Main and Course Dashboard
• Handle the else case for the Course Dashboard
• Enhance Course Navigation Buttons (Next & Previous)
• Registration issue with Email after Incomplete Social Registration
• Add Post Notification Permission

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: -0.01% :warning:

Comparison is base (36a0e15) 1.09% compared to head (d3812fd) 1.09%. Report is 1 commits behind head on app_nav.

:exclamation: Current head d3812fd differs from pull request most recent head ea48dd9. Consider uploading reports for the commit ea48dd9 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## app_nav #1823 +/- ## ============================================ - Coverage 1.09% 1.09% -0.01% Complexity 137 137 ============================================ Files 536 537 +1 Lines 25862 25933 +71 Branches 3296 3310 +14 ============================================ Hits 284 284 - Misses 25551 25622 +71 Partials 27 27 ``` | [Files Changed](https://app.codecov.io/gh/openedx/edx-app-android/pull/1823?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx) | Coverage Δ | | |---|---|---| | [...rg/edx/mobile/event/RefreshCourseDashboardEvent.kt](https://app.codecov.io/gh/openedx/edx-app-android/pull/1823?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx#diff-T3BlbkVkWE1vYmlsZS9zcmMvbWFpbi9qYXZhL29yZy9lZHgvbW9iaWxlL2V2ZW50L1JlZnJlc2hDb3Vyc2VEYXNoYm9hcmRFdmVudC5rdA==) | `0.00% <0.00%> (ø)` | | | [...ain/java/org/edx/mobile/module/prefs/LoginPrefs.kt](https://app.codecov.io/gh/openedx/edx-app-android/pull/1823?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx#diff-T3BlbkVkWE1vYmlsZS9zcmMvbWFpbi9qYXZhL29yZy9lZHgvbW9iaWxlL21vZHVsZS9wcmVmcy9Mb2dpblByZWZzLmt0) | `0.00% <ø> (ø)` | | | [.../java/org/edx/mobile/view/CourseHomeTabFragment.kt](https://app.codecov.io/gh/openedx/edx-app-android/pull/1823?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx#diff-T3BlbkVkWE1vYmlsZS9zcmMvbWFpbi9qYXZhL29yZy9lZHgvbW9iaWxlL3ZpZXcvQ291cnNlSG9tZVRhYkZyYWdtZW50Lmt0) | `0.00% <0.00%> (ø)` | | | [...org/edx/mobile/view/CourseTabsDashboardFragment.kt](https://app.codecov.io/gh/openedx/edx-app-android/pull/1823?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx#diff-T3BlbkVkWE1vYmlsZS9zcmMvbWFpbi9qYXZhL29yZy9lZHgvbW9iaWxlL3ZpZXcvQ291cnNlVGFic0Rhc2hib2FyZEZyYWdtZW50Lmt0) | `0.00% <0.00%> (ø)` | | | [...ava/org/edx/mobile/view/MainDashboardActivity.java](https://app.codecov.io/gh/openedx/edx-app-android/pull/1823?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx#diff-T3BlbkVkWE1vYmlsZS9zcmMvbWFpbi9qYXZhL29yZy9lZHgvbW9iaWxlL3ZpZXcvTWFpbkRhc2hib2FyZEFjdGl2aXR5LmphdmE=) | `0.00% <ø> (ø)` | | | [...a/org/edx/mobile/view/MainTabsDashboardFragment.kt](https://app.codecov.io/gh/openedx/edx-app-android/pull/1823?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx#diff-T3BlbkVkWE1vYmlsZS9zcmMvbWFpbi9qYXZhL29yZy9lZHgvbW9iaWxlL3ZpZXcvTWFpblRhYnNEYXNoYm9hcmRGcmFnbWVudC5rdA==) | `0.00% <0.00%> (ø)` | | | [.../java/org/edx/mobile/view/MyCoursesListFragment.kt](https://app.codecov.io/gh/openedx/edx-app-android/pull/1823?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx#diff-T3BlbkVkWE1vYmlsZS9zcmMvbWFpbi9qYXZhL29yZy9lZHgvbW9iaWxlL3ZpZXcvTXlDb3Vyc2VzTGlzdEZyYWdtZW50Lmt0) | `0.00% <ø> (ø)` | | | [.../main/java/org/edx/mobile/view/RegisterActivity.kt](https://app.codecov.io/gh/openedx/edx-app-android/pull/1823?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx#diff-T3BlbkVkWE1vYmlsZS9zcmMvbWFpbi9qYXZhL29yZy9lZHgvbW9iaWxlL3ZpZXcvUmVnaXN0ZXJBY3Rpdml0eS5rdA==) | `0.00% <0.00%> (ø)` | | | [.../org/edx/mobile/view/adapters/CourseHomeAdapter.kt](https://app.codecov.io/gh/openedx/edx-app-android/pull/1823?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx#diff-T3BlbkVkWE1vYmlsZS9zcmMvbWFpbi9qYXZhL29yZy9lZHgvbW9iaWxlL3ZpZXcvYWRhcHRlcnMvQ291cnNlSG9tZUFkYXB0ZXIua3Q=) | `0.00% <0.00%> (ø)` | | | [...obile/view/app\_nav/CourseUnitNavigationActivity.kt](https://app.codecov.io/gh/openedx/edx-app-android/pull/1823?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx#diff-T3BlbkVkWE1vYmlsZS9zcmMvbWFpbi9qYXZhL29yZy9lZHgvbW9iaWxlL3ZpZXcvYXBwX25hdi9Db3Vyc2VVbml0TmF2aWdhdGlvbkFjdGl2aXR5Lmt0) | `0.00% <0.00%> (ø)` | | | ... and [1 more](https://app.codecov.io/gh/openedx/edx-app-android/pull/1823?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx) | | ... and [3 files with indirect coverage changes](https://app.codecov.io/gh/openedx/edx-app-android/pull/1823/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx)

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