Tint the buttons when taskbar isn't drawing a background (either due to alpha or offset).
Test: Dark icons on a light wallpaper on home screen, dark icons when light IME is showing
Bug: 204256643
Change-Id: Iae634a1b604f50edc102905abd0d812a43c5346e
* Keep home and recents button, and rotate back button
to be down when IME shows in 3 button task bar.
* Move IME switcher to left side of taskbar for 3 button,
keep on right side for gesture nav.
Bug: 191399224
Test: Tested RTL and LTR, gesture + button nav
with and w/o IME.
Change-Id: I7959d26986e546596e2436b8b5eb7668f44b55cf
> Calculating the hotseat padding statically
> Animating taskbar views individually when animating to home
instead of a layout animation
> Moving all navbar buttons to a separate layout/controller and independent
of Launcher
> Fixing RTL layout for taskbar and nav bar
Bug: 187353581
Test: Manual
Change-Id: If21696f38beee328f553e467394776a8e8ed4c3e