Fix link-type check warning on com.android.media.remotedisplay

The library has been built without SDK, and is used by an app
RemoteDisplayProviderTest that is built with SDK. Such this SDK ->
non-SDK dependency has been causing link-type check warnings, which will
turn into errors soon.

This change fixes the warning by making a stub library
com.android.media.remotedisplay.stubs from the runtime library and let the app
to link against the stub library. Since the stubs library does not use any
private APIs, it is built with SDK.

Bug: 69899800
Test: m -j RemoteDisplayProviderTest is successful and does not show any
link-type check warning.

Change-Id: I7ee297a9d1aa4f01136b9a026a4939df2d483b8c
diff --git a/tests/RemoteDisplayProvider/Android.mk b/tests/RemoteDisplayProvider/Android.mk
index 2f4b343..e827ec2 100644
--- a/tests/RemoteDisplayProvider/Android.mk
+++ b/tests/RemoteDisplayProvider/Android.mk
@@ -21,6 +21,6 @@
 LOCAL_SDK_VERSION := current
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 LOCAL_RESOURCE_DIR = $(LOCAL_PATH)/res
-LOCAL_JAVA_LIBRARIES := com.android.media.remotedisplay
+LOCAL_JAVA_LIBRARIES := com.android.media.remotedisplay.stubs
 LOCAL_CERTIFICATE := platform
 include $(BUILD_PACKAGE)