Personalization accessibility

[nbradbury]

Fixes #21444 - As noted here, our personalization cards are impossible to navigate with a screen reader. This PR aims to resolve that.

To test:

• At the bottom of the My Site tab, tap "Personalize your home tab"
• Enable TalkBack
• Note that the cards are clickable and the spoken labels are more descriptive

I also added a better contentDescription to the Shortcuts section.

[dangermattic]

	2 Warnings
:warning:	strings.xml files should only be updated on release branches, when the translations are downloaded by our automation.
:warning:	PR is not assigned to a milestone.

Generated by :no_entry_sign: Danger

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress by scanning the QR code below to install the corresponding build.

	App Name	WordPress
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr21445-e5d90e9
	Commit	e5d90e90dbc91e2a15777d3178f8a8d5e6912c78
	Direct Download	wordpress-prototype-build-pr21445-e5d90e9.apk

Note: Google Login is not supported on these builds.

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack by scanning the QR code below to install the corresponding build.

	App Name	Jetpack
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr21445-e5d90e9
	Commit	e5d90e90dbc91e2a15777d3178f8a8d5e6912c78
	Direct Download	jetpack-prototype-build-pr21445-e5d90e9.apk

Note: Google Login is not supported on these builds.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 15 lines in your changes missing coverage. Please review.

Project coverage is 39.50%. Comparing base (ae41f3f) to head (e5d90e9). Report is 27 commits behind head on trunk.

Files with missing lines	Patch %	Lines
.../mysite/personalization/PersonalizationActivity.kt	0.00%	15 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## trunk #21445 +/- ## ======================================= Coverage 39.50% 39.50% ======================================= Files 2120 2120 Lines 99438 99438 Branches 15282 15282 ======================================= Hits 39281 39281 Misses 56675 56675 Partials 3482 3482 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.