Add truth for better badging diff output

[alexvanyo]

Adds truth to the badging task to give a better diff output for the golden and generated badging files.

Error message before:

> Task :app:checkProdReleaseBadging FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:checkProdReleaseBadging'.
> Generated badging is different from golden badging! If this change is intended, run ./gradlew updateProdReleaseBadging

Error message after:

> Task :app:checkProdReleaseBadging FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:checkProdReleaseBadging'.
> Generated badging is different from golden badging! If this change is intended, run ./gradlew updateProdReleaseBadging
  value of:
      readText$default(...)
  diff (-expected +actual):
      @@ -2,6 +2,7 @@
       sdkVersion:'21'
       targetSdkVersion:'34'
       uses-permission: name='android.permission.INTERNET'
      +uses-permission: name='android.permission.RECORD_AUDIO'
       uses-permission: name='android.permission.ACCESS_NETWORK_STATE'
       uses-permission: name='android.permission.POST_NOTIFICATIONS'
       uses-permission: name='android.permission.WAKE_LOCK'
      @@ -111,6 +112,8 @@
       feature-group: label=''
         uses-feature: name='android.hardware.faketouch'
         uses-implied-feature: name='android.hardware.faketouch' reason='default feature for all apps'
      +  uses-feature: name='android.hardware.microphone'
      +  uses-implied-feature: name='android.hardware.microphone' reason='requested android.permission.RECORD_AUDIO permission'
       main
       other-activities
       other-receivers