Tapping on Play media can have up to a 1 minute delay

-Set Output Switcher activity in PendingIntent
-Broadcast is super lagged right after reboot
-Not to send broadcast to itself in order to launch Output Switcher
-Add test case

Bug: 152909957
Test: make -j42 RunSettingsRoboTests
Change-Id: I17280a3bb9e47aa6050cfaf1463c780cd9849ad7