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: I921b3575734c2b30840179910e5a3d8153d9dd06
Change-Id: I921b3575734c2b30840179910e5a3d8153d9dd06
(cherry picked from commit e42850f4b8b1ad38f526c494db07259aeb09f8a0)