Make MtpDatabase use libexif instead of libjhead

-Original Commit:
https://github.com/CyanogenMod/android_frameworks_base/commit/aefa427c27396bef64ee37d5c4d94e0a63cf7b05

Change-Id: I0d3f99f0f6f15c72cac2180dd7fba3c6cc901737