[automerger skipped] MultiDexLegacy minsdk bump from 8 to 21 am: 7aad87787d -s ours

am skip reason: Merged-In I3525c27e0f0121e66c4f579aef5cba1999ffdacd with SHA-1 9fcddeb6f6 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/27594944

Change-Id: Ia912b8bd72f090329913760e765ab89c9eb6965c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>