[automerger skipped] Merge "Revert "AOSP/Email - Bump targetSdkVersion to 28."" into qt-dev
am: af3a1fc9f9 -s ours
am skip reason: change_id I66beb67a7bb74bd272c65777adbcd1f8d0d12835 with SHA1 18f04be2a6 is in history

Change-Id: I757e7d3327ea744919c922c5cdd1938e9ad14029