Introduce flag for min supported target sdk

Test: Build and flash
Test: adb shell getprop ro.build.version.min_supported_target_sdk
Bug: 297603927
Change-Id: Ia5f41f0cf75b7072b30afc9bbf66dc1081085233
Merged-In: Ia5f41f0cf75b7072b30afc9bbf66dc1081085233
1 file changed
tree: 70c4709e70d5e4762ba83b3bb7b1c049c82946d3
  1. aconfig/
  2. build_config/
  3. build_flags.scl
  4. OWNERS
  5. release_config_map.mk