Merge "Document Signature equals/hash should not include flags" into sc-dev am: 969c4968

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13424617

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I2fb454e11372ee55180e152942a4b1d2b244a303