Replace getCallingActivity() with getLaunchedFromPackage()

getLaunchedFromPackage() reports who launched this Activity or built
PendingIntent used to launch it, whereas getCallingActivity() reports
who will get result of Activity.

Bug: 316891059
Test: robotest, manual
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:901880a1d2e632179eb4ac708fc4bc18d9d50791)
Merged-In: If97018c2741caef622f0596bbfeaa42ef1788b78
Change-Id: If97018c2741caef622f0596bbfeaa42ef1788b78