Sharesheet - Lock direct share row

Add single direct share row this is always present, prepare for
expanding to 2. Show message about missing direct share targets
if none are found in the first XX seconds. Use animations to
transition between the states. Add border dividers between sections

Bug: 126565347
Test: atest ChooserActivityTest
Change-Id: I31963375530433c3d6e9069402b5a20df5766034