Animate the screen recording dialog (1/2)

This CL animates the screen recording dialog when opened from its QS
tile.

See b/202257558#comment3 and #comment4 for before/after videos.

Bug: 202257558
Test: Manual
Test: atest ScreenRecordTileTest
Test: atest RecordingControllerTest
Change-Id: I49cff0381c85ef870fea03b62bfe8d9c5fb0a110