SystemUI: more consistent nav tinting behavior

Change-Id: If4415e717340d15addb954e385cd2ac2fd6ba12d
Signed-off-by: Roman Birg <romanbirg@gmail.com>
fix IME overlapping fields while typing in certain situations

Change-Id: Ia8762443b4f43174fb416bd432c2e70f97881558
Signed-off-by: Roman Birg <romanbirg@gmail.com>
Fix systemui crash during theme changes on devices without navigation bar.