Add LOCAL_AAPT2_ONLY

This allows modules to specify that they may only be used from modules
using aapt2. Using aapt2 removes absolute path references to modules, so
this can be useful if a module is preparing to move its sources, or
replace itself with a prebuilt aar.

Test: m
Test: Label frameworks/support/design; m
Test: Label frameworks/support/v4; m
Test: build/soong/build_test.bash
Change-Id: Icfb3d4b19a6a0e3a3bb00091d2a97a4d88c0c761

core/clear_vars.mk

@@ -4,6 +4,7 @@
 
 # '',true
 LOCAL_32_BIT_ONLY:=
+LOCAL_AAPT2_ONLY:=
 LOCAL_AAPT_FLAGS:=
 LOCAL_AAPT_INCLUDE_ALL_RESOURCES:=
 LOCAL_ADDITIONAL_CERTIFICATES:=

core/java_common.mk

@@ -414,7 +414,14 @@ my_warn_types :=
 my_allowed_types := java:sdk java:system java:platform
 endif
 
-my_link_deps := $(addprefix JAVA_LIBRARIES:,$(LOCAL_STATIC_JAVA_LIBRARIES))
+ifdef LOCAL_AAPT2_ONLY
+my_link_type += aapt2_only
+endif
+ifdef LOCAL_USE_AAPT2
+my_allowed_types += aapt2_only
+endif
+
+my_link_deps := $(addprefix JAVA_LIBRARIES:,$(LOCAL_STATIC_JAVA_LIBRARIES) $(LOCAL_JAVA_LIBRARIES))
 my_link_deps += $(addprefix APPS:,$(apk_libraries))
 
 my_2nd_arch_prefix := $(LOCAL_2ND_ARCH_VAR_PREFIX)

core/package_internal.mk

@@ -146,6 +146,10 @@ ifneq ($(all_assets),)
 need_compile_asset := true
 endif
 
+ifdef LOCAL_AAPT2_ONLY
+LOCAL_USE_AAPT2 := true
+endif
+
 my_res_package :=
 ifdef LOCAL_USE_AAPT2
 # In aapt2 the last takes precedence.

core/prebuilt_internal.mk

@@ -547,6 +547,10 @@ $(common_classes_pre_proguard_jar) : $(my_src_jar)
 $(common_javalib_jar) : $(common_classes_jar)
 	$(transform-prebuilt-to-target)
 
+ifdef LOCAL_AAPT2_ONLY
+LOCAL_USE_AAPT2 := true
+endif
+
 ifdef LOCAL_USE_AAPT2
 ifneq ($(my_src_aar),)
 LOCAL_SDK_RES_VERSION:=$(strip $(LOCAL_SDK_RES_VERSION))

core/static_java_library.mk

@@ -28,6 +28,10 @@ intermediates.COMMON := $(call local-intermediates-dir,COMMON)
 
 my_res_package :=
 
+ifdef LOCAL_AAPT2_ONLY
+LOCAL_USE_AAPT2 := true
+endif
+
 # Hack to build static Java library with Android resource
 # See bug 5714516
 all_resources :=