Move aapt flags from java_common.mk to aapt_flags.mk

The aapt flags were being set in java_common.mk, which is used by
various entry points.  host_dalvik_java_library.mk and
host_java_library.mk, and java_library.mk don't support aapt, only
package_internal.mk and static_java_library.mk do.  Move the aapt
flags into aapt_flags.mk, and include it from package_internal.mk
and static_java_library.mk.

Bug: 73885582
Test: no change to build-${TARGET_PRODUCT}.ninja
Change-Id: I124393846d37b9bbc941272cce4274121ac235ef
diff --git a/core/package_internal.mk b/core/package_internal.mk
index b731bfa..c47b77d 100644
--- a/core/package_internal.mk
+++ b/core/package_internal.mk
@@ -367,6 +367,8 @@
 
 resource_export_package :=
 
+include $(BUILD_SYSTEM)/aapt_flags.mk
+
 ifeq ($(need_compile_res),true)
 
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