Show badged icons on the quick settings user switcher drop-down.

Bug: 204931168
Bug: 207175350

Test: Visual verification using the emulator.
Test: atest ProfileSwitcherTest

Change-Id: I8961c12c794ccaeac8fa8c958a2a9089525f0bed
Merged-In: I8961c12c794ccaeac8fa8c958a2a9089525f0bed
(cherry picked from commit 0214c01da9347ec90359bc4878e89012edf3f600)