DO NOT MERGE: Fix batterystats battery level int packing

We introduced some new flag at the lowest significant bit of the
battery level int but failed to account for it when unpacking.

Bug:25596467
Change-Id: I4320e6fcc208ec6de249b14fe3e399ab2f32d839
(cherry picked from commit 6902052c77bbcb9078b4ced243874f67542f64f9)
1 file changed