Update/minor ui change

[ryuash]

Description

Very small changes I don't think an issue is needed.

• Got rid of the status bar background color in android
• Adjusted sizebox and padding for post content

Checklist

• [x] Targeted PR against correct branch.
• [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• [ ] Wrote unit tests.
• [x] Run flutter format.
• [ ] Updated the documentation.
• [ ] Added an entry to the CHANGELOG.md file.
• [x] Re-reviewed Files changed in the Github PR explorer.

[codecov[bot]]

Codecov Report

Merging #122 into master will decrease coverage by 0.04%. The diff coverage is 16.66%.

@@            Coverage Diff             @@
##           master     #122      +/-   ##
==========================================
- Coverage   35.65%   35.60%   -0.05%     
==========================================
  Files         262      262              
  Lines        6600     6606       +6     
==========================================
- Hits         2353     2352       -1     
- Misses       4247     4254       +7     

Impacted Files	Coverage Δ
...main_content/widgets/post_comments_list/index.dart	0.00% <0.00%> (ø)
lib/ui/widgets/post_images_previewer/index.dart	18.18% <0.00%> (-0.57%)	:arrow_down:
lib/ui/widgets/post_item_header/index.dart	87.50% <ø> (ø)
lib/ui/widgets/post_content/index.dart	83.33% <25.00%> (-16.67%)	:arrow_down:
...dgets/post_content/widgets/link_preview/index.dart	87.80% <100.00%> (ø)

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