Build Support7Demos with AAPT2

Bug:25958912
Change-Id: I4920fda963d1c852ce3e8cfe2295db02bd2e5e43
diff --git a/samples/Support7Demos/Android.mk b/samples/Support7Demos/Android.mk
index 21d34a9..0cf9dcb 100644
--- a/samples/Support7Demos/Android.mk
+++ b/samples/Support7Demos/Android.mk
@@ -15,36 +15,20 @@
 LOCAL_PATH:= $(call my-dir)
 
 # Build the samples.
-# We need to add some special AAPT flags to generate R classes
-# for resources that are included from the libraries.
 include $(CLEAR_VARS)
+LOCAL_USE_AAPT2 := true
 LOCAL_PACKAGE_NAME := Support7Demos
 LOCAL_MODULE_TAGS := samples tests
 LOCAL_SDK_VERSION := current
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
-LOCAL_STATIC_JAVA_LIBRARIES := \
-        android-support-v4 \
-        android-support-v7-appcompat \
-        android-support-v7-gridlayout \
-        android-support-v7-mediarouter \
-        android-support-v7-palette \
-        android-support-v7-recyclerview \
-        android-support-v7-cardview
-LOCAL_RESOURCE_DIR = \
-        $(LOCAL_PATH)/res \
-        frameworks/support/v7/appcompat/res \
-        frameworks/support/v7/gridlayout/res \
-        frameworks/support/v7/mediarouter/res \
-        frameworks/support/v7/cardview/res \
-        frameworks/support/design/res \
-        frameworks/support/v7/recyclerview/res
-LOCAL_AAPT_FLAGS := \
-        --auto-add-overlay \
-        --extra-packages android.support.v7.appcompat \
-        --extra-packages android.support.v7.cardview \
-        --extra-packages android.support.v7.gridlayout \
-        --extra-packages android.support.v7.mediarouter \
-        --extra-packages android.support.design \
-        --extra-packages android.support.v7.recyclerview \
-        --no-version-vectors
+LOCAL_STATIC_ANDROID_LIBRARIES := \
+    android-support-v7-appcompat \
+    android-support-v7-gridlayout \
+    android-support-v7-mediarouter \
+    android-support-v7-cardview \
+    android-support-design \
+    android-support-v7-recyclerview \
+    android-support-v7-palette \
+    android-support-v4
+LOCAL_AAPT_FLAGS := --no-version-vectors
 include $(BUILD_PACKAGE)