Send the Audio Usage down from AudioPolicyManager

Store audioUsgae in AudioAttributes and send it down to
AudioFlinger::openOutput_l. Then extract audioUsage and store in
SourceMetadata to pass it down to the HAL layer.

Bug: 297875432
Test: Add a fake audio usage in attribute in AudioFlinger::openoutput(), then test by checking the log message. The fake usage does get pass down to the DeviceHalAidl::openOutputStream().
Flag: EXEMPT bugfix
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:f6e304f9c5066ae829a91dcd98bc6045a13a8b30)
Merged-In: Ic9a739f1de50485304187be5c4b603955afabbf8
Change-Id: Ic9a739f1de50485304187be5c4b603955afabbf8
diff --git a/services/audiopolicy/tests/AudioPolicyManagerTestClient.h b/services/audiopolicy/tests/AudioPolicyManagerTestClient.h
index 072d9c0..6382c71 100644
--- a/services/audiopolicy/tests/AudioPolicyManagerTestClient.h
+++ b/services/audiopolicy/tests/AudioPolicyManagerTestClient.h
@@ -41,7 +41,8 @@
                         audio_config_base_t * /*mixerConfig*/,
                         const sp<DeviceDescriptorBase>& /*device*/,
                         uint32_t * /*latencyMs*/,
-                        audio_output_flags_t /*flags*/) override {
+                        audio_output_flags_t /*flags*/,
+                        audio_attributes_t /*attributes*/) override {
         if (module >= mNextModuleHandle) {
             ALOGE("%s: Module handle %d has not been allocated yet (next is %d)",
                   __func__, module, mNextModuleHandle);