Set min_sdk_version to be part of mainline modules

Modules contributing mainline modules (APK/APEX) should set
min_sdk_version as well as apex_available.

For now setting min_sdk_version doesn't change build outputs.
But build-time checks will be added soon.

Bug: 152655956
Test: m
Merged-In: I87ce41ad18a7a39f2c6c41c5aec2d8338db3ec8d
Change-Id: I87ce41ad18a7a39f2c6c41c5aec2d8338db3ec8d
(cherry picked from commit dfe14f12b7432fc95bab2f6b0c8bcc609314c55f)
3 files changed