> Using {packageName} instead of hardcoding com.android.launcher3 in AndroidManifest.xml
for strings which are dependent on packageName
> Adding proguard rule to prevent obfuscating any overridable class
> Making it easier to extend SettingsActivity by overriding the fragment class
Change-Id: I5668c3f33b4cf20ad01d7f54b3d79cc0d268d391
Background: PackageInfo may not have changed but when upgrading from N to O, the icon
cache need to refresh in order to show Adaptive icons.
Bug: 65062494
Change-Id: If3bf579c3dd035fe8d4e10c5741532fdb2a9d6fe
