Deprecate AImageReader_getWindowNativeHandle

After Android U, new devices will no longer have HIDL support and will
no longer need to use AImageReader_getWindowNativeHandle.

Test: atest ACameraNdkVendorTest
Bug: 283283111

Change-Id: Ia774f27aeb76e70a0f4e2e4dcb5d4b59af22b9e4
Merged-In: Ia774f27aeb76e70a0f4e2e4dcb5d4b59af22b9e4
diff --git a/media/ndk/NdkImageReader.cpp b/media/ndk/NdkImageReader.cpp
index caee37d..7b19ac0 100644
--- a/media/ndk/NdkImageReader.cpp
+++ b/media/ndk/NdkImageReader.cpp
@@ -570,6 +570,9 @@
     }
 }
 
+// The LL-NDK API is now deprecated. New devices will no longer have the token
+// manager service installed, so createHalToken will return false and this
+// will return AMEDIA_ERROR_UNKNOWN on those devices.
 media_status_t AImageReader::getWindowNativeHandle(native_handle **handle) {
     if (mWindowHandle != nullptr) {
         *handle = mWindowHandle;