API 30: Access to installed packages is restricted

When we target API 30 we'll need to make changes to retain the ability to check whether power management apps are installed:

https://medium.com/androiddevelopers/package-visibility-in-android-11-cc857f221cd9

• AndroidTorPlugin: pm.getPackageInfo(app.getPackageName(), 0)
• AndroidWakeLockManagerImpl: packageName.startsWith()
• PanicPreferencesFragment: pm.getApplicationInfo(panicTriggerApp)
• PanicPreferencesFragment: intent.resolveActivity(pm)
• PanicPreferencesFragment: PanicResponder.resolveTriggerApps(pm)
• ScreenFilterMonitorImpl: pm.getInstalledPackages(GET_PERMISSIONS)
• ScreenFilterMonitorImpl: pm.getPackageInfo(PLAY_SERVICES_PACKAGE, GET_SIGNATURES)
• SettingsFragment: intent.resolveActivity(pm)
• HuaweiView: pm.queryIntentActivities(i, PackageManager.MATCH_DEFAULT_ONLY)
• KeyAgreementActivity: Intent(ACTION_REQUEST_DISCOVERABLE).resolveActivity(pm)
• LinkDialogFragment: pm.queryIntentActivities()