Update the ambient indication container

- Move the ambient indication container to the keyguard
bottom area so that the KeyguardBottomAreaView can control
the x and y burn-in offsets so that they are equivalent to the
charging text burn in offsets.

Test: atest KeyguardBottomAreaTest
Test: manual
Bug: 206122454
Change-Id: I85d7684aa7f229a5c04a6c35ea0cffa449b876e4