improved app startup and handled user notification

[rudrat0319]

Purpose / Description

Closes: #20168
Parent issue: #19552

When a component fails to initialize during app startup, the failure was previously silent. The app would continue loading but the affected feature would be unavailable with no notification to the user or developer.

The specific case that motivated this change is the ReviewReminder deserialization failure (#20163), where a missing onlyNotifyIfNoReviews field caused AlarmManagerService.scheduleAllNotifications() to fail silently.

Changes

AnkiDroidApp.kt

• Added NonFatalInitializationError data class to represent a
  recoverable startup failure, holding the component name and exception
• Added nonFatalStartupErrors list to collect failures during onCreate()
• Wrapped AlarmManagerService.scheduleAllNotifications() in a
  try-catch block so a ReviewReminder deserialization failure no longer
  silently breaks the notification system
• Exposed nonFatalStartupErrors via companion object for DeckPicker
  to read after startup completes

DeckPicker.kt

• Added showNonFatalStartupErrors() function called at the end of
  onCreate(), after the UI is fully ready
• Shows an AlertDialog listing which components failed to load
• Reports each error to developers via CrashReportService/ACRA so
  failures are tracked even when users don't report them

res/values/strings.xml

• Added startup_error_title string
• Added startup_error_message string

Behavior

Before this change:

• AlarmManagerService fails during startup
• App continues silently
• Review reminders don't work
• User has no idea why
• Developer gets no report

After this change:

• AlarmManagerService fails during startup
• Error is caught and collected
• App continues loading remaining components
• User sees a dialog listing which features failed
• Developer receives an automatic crash report via ACRA

Testing

• Tested on API 33 emulator (Pixel 6)
• Verified dialog appears when a startup component throws
• Verified dialog does NOT appear on a clean startup with no errors
• Verified ACRA report is sent for each captured error

[github-actions]

Important

Maintainers: This PR contains Strings changes

1. Sync Translations before merging this PR and wait for the action to complete
2. Review and merge the auto-generated PR in order to sync all user-submitted translations
3. Sync Translations again and merge the PR so the huge automated string changes caused by merging this PR are by themselves and easy to review

[david-allison]

Initially: investigate https://developer.android.com/jetpack/androidx/releases/startup

-- #20168 (comment)

This PR isn't close to what was expected. Sorry.

[rudrat0319]

@david-allison I understand I might have mistaken or misunderstood what was supposed to be implemented. If you can help me understand better I can fix it and submit another PR. else, no issues.

[david-allison]

No worries, I'll take it on when I have time