[NR-251338] Add supportability metrics for important AEI operations

[cthomas-newrelic]

Adds the standard feature flag API metrics:

• Supportability/Mobile/Android///API/enableFeature/ApplicationExitReporting
• Supportability/Mobile/Android///API/disableFeature/ApplicationExitReporting

And those specific to AEI data:

• Supportability/AgentHealth/ApplicationExitInfo/unsupportedOS/{sdkVersion}
• Supportability/AgentHealth/ApplicationExitInfo/status/{status code}
• Supportability/AgentHealth/ApplicationExitInfo/reason/{reason code}
• Supportability/AgentHealth/ApplicationExitInfo/importance/{importance code}

And those specific to AEI configuration:

• Supportability/AgentHealth/ApplicationExitInfo/remoteConfiguration/{enabled|disabled}

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 83.33333% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 55.93%. Comparing base (4ed86ee) to head (c5a10d4).

Files	Patch %	Lines
...ic/agent/android/ApplicationExitConfiguration.java	71.42%	0 Missing and 2 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## feature/nr230991-appExitInfo #220 +/- ## ================================================================== + Coverage 55.87% 55.93% +0.06% - Complexity 3221 3225 +4 ================================================================== Files 323 323 Lines 16405 16412 +7 Branches 1784 1787 +3 ================================================================== + Hits 9166 9180 +14 + Misses 6277 6266 -11 - Partials 962 966 +4 ```

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