Merge "Revert "Update minimum supported targetSdk to 28."" am: d643a20d8a

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

Change-Id: Ic6be7c736159ecae0f3cfa0e85cc2894a9369768
diff --git a/core/version_util.mk b/core/version_util.mk
index b835241..b7c4e48 100644
--- a/core/version_util.mk
+++ b/core/version_util.mk
@@ -240,6 +240,6 @@
   # 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