[automerger skipped] Merge "Replace LanguageTag.isLanguage with public API" am: 1db88034cc am: 9cf8dd91bd am: 5c374b80f5 -s ours

am skip reason: Change-Id If9cc4df26182141d292a218a5f4cba442e802309 with SHA-1 7d9e11576f is in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1531679

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I3ba61dcda07b641e4b438d84ebb1bb7353e2d666