SystemUI: NavbarEditor: Fix saveKeys logic

In landscape, the keys are saved backwards in the for-loop, but it would crash out due from
an IndexOutOfBounds error since it's subtracting i from the array length while i = 0.

Change-Id: I405c5d962d8c575cfee57b09a7e55a8a6efc2d24
SystemUI: enable equalizer for Wifi display

While the EQ doesn't work while using the Chromecast, using Wireless
display (miracast) still allows for control of the EQ since it's
streaming from the device.

Change-Id: I7322429b39438e66c013456b6f8a3242e333d93a
Signed-off-by: Roman Birg <roman@cyngn.com>