Merge "Revert "Update minimum supported targetSdk to 28."" am: d643a20 am: cf5f83a am: f3a78d5 am: c55fca1

Original change: https://android-review.googlesource.com/c/platform/build/+/1960148

Change-Id: I985bc4b98f7f7c2c97048923ec5a508708fef918

Author: Joseph Jang

core/version_util.mk

@@ -240,6 +240,6 @@ ifndef PLATFORM_MIN_SUPPORTED_TARGET_SDK_VERSION
   # Used to set minimum supported target sdk version. Apps targeting sdk
   # version lower than the set value will result in a warning being shown
   # when any activity from the app is started.
-  PLATFORM_MIN_SUPPORTED_TARGET_SDK_VERSION := 28
+  PLATFORM_MIN_SUPPORTED_TARGET_SDK_VERSION := 23
 endif
 .KATI_READONLY := PLATFORM_MIN_SUPPORTED_TARGET_SDK_VERSION