Merge "Utils: add lower bound checks for MediaFormat keys" am: 7898c43f65 am: 1fe4d1a426 am: 2da6879df8

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1875074

Change-Id: I13c6936c36e4d86f674efe324debc7b0bf5ec34a