SystemUI: fix up initial cursor down flags on nav bar

We were using the regular flags for the initial ACTION_DOWN event so the
FLAG_KEEP_TOUCH_MODE was not being passed and allowed the cursor to jump
out of bounds slightly.

Change-Id: I5b4d2a5e5e0ce562985fcc3b7b6fac8b4abc49da
Signed-off-by: Roman Birg <roman@cyngn.com>

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyButtonView.java
SystemUI: fix nav bar layout while toggling cursor keys with an IME up

Previously there was no option to have the IME up on that settings
screen so this was not a concern before; however, with the addition of
searchable settings, it seems users are now trying to toggle it with the
IME active, putting the nav bar in a strange state becuase it did not
restore the previous states properly.

Change-Id: Ib03ff3d9ee9679819eaa42644796e8f9eae6e694
Signed-off-by: Roman Birg <roman@cyngn.com>