RESTRICT AUTOMERGE Use getLaunchedFromPackage instead of getCallingPackage

Ensure that MediaProjectionPermissionActivity is doing proper
attribution and validation of permissions before showing.

Bug: 372670004
Bug: 373581993
Test: presubmit
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:39ff0377a592fa9bacd308e982a397106665a046)
Merged-In: I48adb14fbc8d5f2f2e21ef8a30a713d33f03ab02
Change-Id: I48adb14fbc8d5f2f2e21ef8a30a713d33f03ab02