Keyboard and search now close when appropriate.

Keyboard should close when:
 - requeting permission
 - placing a call
 - leaving the app

Search should close when:
 - placing a call
 - leaving the app

Bug: 74235853
Test: search closing onPause tests already exist (MainActivityOldPeerSearchIntegrationTest#placingCallFromSearchClosesSearch)
PiperOrigin-RevId: 188812026
Change-Id: Iaee084c59b4c514d10375deff5d73d5a456ef9df