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
Automatic translation import

Change-Id: I33ed5e253fd73bba266b20fbd15082c5fba96ae2
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_frameworks_base into DJL11