fix: missing pending intents mutability for Android 12+

[azlekov]

New Pull Request Checklist

• I am not disclosing a vulnerability.
• I am creating this PR in reference to an issue.

Issue Description

Pending intents mutability

If your app targets Android 12, you must specify the mutability of each PendingIntent object that your app creates. This additional requirement improves your app's security.

https://developer.android.com/about/versions/12/behavior-changes-12#pending-intent-mutability

Related issue: #1137
Closes #1137

Approach

Freeze version of the compile and target to the newest version 31 and on Android 12 versions set PendingIntent immutability flags when receiving Parse notifications.

TODOs before merging

• Add tests
• Add changes to documentation (guides, repository pages, in-code descriptions)
• A changelog entry is created automatically using the pull request title (do not manually add a changelog entry)

[parse-github-assistant]

Thanks for opening this pull request!

• 🎉 We are excited about your hands-on contribution!

[codecov]

Codecov Report

Merging #1139 (c1a9958) into master (ac6d9e0) will increase coverage by 0.80%.
The diff coverage is 40.00%.

@@             Coverage Diff              @@
##             master    #1139      +/-   ##
============================================
+ Coverage     65.30%   66.11%   +0.80%     
- Complexity     2218     2241      +23     
============================================
  Files           122      122              
  Lines          9961     9965       +4     
  Branches       1338     1339       +1     
============================================
+ Hits           6505     6588      +83     
+ Misses         2943     2860      -83     
- Partials        513      517       +4     

Impacted Files	Coverage Δ
...rse/src/main/java/com/parse/ParseCommandCache.java	8.12% <0.00%> (+5.93%)	⬆️
...ain/java/com/parse/ParsePushBroadcastReceiver.java	43.41% <66.66%> (+43.41%)	⬆️
...arse/src/main/java/com/parse/ParseCorePlugins.java	67.39% <0.00%> (+0.54%)	⬆️
...se/src/main/java/com/parse/ParseKeyValueCache.java	46.93% <0.00%> (+2.04%)	⬆️
parse/src/main/java/com/parse/Parse.java	59.90% <0.00%> (+2.41%)	⬆️

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[azlekov]

@mtrezza I cannot understand the failing CI/CD task. This PR should be done.

[mtrezza]

The CI fails because this PR decreases code coverage. We require PRs to at least cover their own added code.

[azlekov]

@mtrezza I have add some tests for building the notifications but and I patched the ParseCommandCache as there ware some null pointer exceptions when there's no internet permissions on the tests. Please ignore if possible codecov/patch

[mtrezza]

Looks good!

[parseplatformorg]

🎉 This change has been released in version 2.0.6