Revert "Append APEX version instead of build ID for APK-in-APEX ..."

Revert submission 2067907-apk-in-apex

Bug: 230873680

Reason for revert: Change broke aab generation b/230873680
Reverted Changes:
I9cef1418c:Append APEX version instead of build ID for APK-in...
Ic37eeba8b:Make apexer replace instances of version placehold...

Change-Id: Ib113d56901e815435f71bf878049cdabd210503c