Move hiddenapi lists droidcore calls to tools/platform-compat/.

Bug: 145132366
Test: m dist
Change-Id: I0863d428cdeb56551caa0fd548ab50fdcad96ece

Android.mk

@@ -75,12 +75,6 @@ framework-doc-stubs: $(SDK_METADATA)
 # Run this for checkbuild
 checkbuild: doc-comment-check-docs
 
-# ==== hiddenapi lists =======================================
-ifneq ($(UNSAFE_DISABLE_HIDDENAPI_FLAGS),true)
-$(call dist-for-goals,droidcore,$(INTERNAL_PLATFORM_HIDDENAPI_FLAGS))
-$(call dist-for-goals,droidcore,$(INTERNAL_PLATFORM_HIDDENAPI_GREYLIST_METADATA))
-endif  # UNSAFE_DISABLE_HIDDENAPI_FLAGS
-
 # Include subdirectory makefiles
 # ============================================================