Adjust indicator bounds to use desktop stableBounds.

Fixes indicators showing on top of taskbar by using
stableBoundsForDesktopMode rather than display width and height.

Fix: 369593509
Fix: 369592405
Test: Manual
Flag: EXEMPT bugfix
Change-Id: I0e12fbd96c910f7b0b4d4dc8436b3941c401c92e