audio policy service: Add introspection API to retrieve AudioProductStrategies

This CL adds required introspection APIs to deal with product strategies:

-getter of the collection of product strategies
-helper function to return the strategy associated to a given attributes.
This API is mandatory to avoid duplicating the logic that compiles the strategy
for a given Audio Attributes structure.

Test: make

Change-Id: I0e107570a44227bb52a4f359954c93215d4f8bae
Signed-off-by: François Gaffie <francois.gaffie@renault.com>
diff --git a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
index 45fb174..d9fbdaa 100644
--- a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
+++ b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
@@ -1186,4 +1186,22 @@
     return mAudioPolicyManager->isHapticPlaybackSupported();
 }
 
+status_t AudioPolicyService::listAudioProductStrategies(AudioProductStrategyVector &strategies)
+{
+    if (mAudioPolicyManager == NULL) {
+        return NO_INIT;
+    }
+    Mutex::Autolock _l(mLock);
+    return mAudioPolicyManager->listAudioProductStrategies(strategies);
+}
+
+product_strategy_t AudioPolicyService::getProductStrategyFromAudioAttributes(
+        const AudioAttributes &aa)
+{
+    if (mAudioPolicyManager == NULL) {
+        return PRODUCT_STRATEGY_NONE;
+    }
+    Mutex::Autolock _l(mLock);
+    return mAudioPolicyManager->getProductStrategyFromAudioAttributes(aa);
+}
 } // namespace android
diff --git a/services/audiopolicy/service/AudioPolicyService.h b/services/audiopolicy/service/AudioPolicyService.h
index c073b7c..ee293a7 100644
--- a/services/audiopolicy/service/AudioPolicyService.h
+++ b/services/audiopolicy/service/AudioPolicyService.h
@@ -229,6 +229,9 @@
 
     virtual bool     isHapticPlaybackSupported();
 
+    virtual status_t listAudioProductStrategies(AudioProductStrategyVector &strategies);
+    virtual product_strategy_t getProductStrategyFromAudioAttributes(const AudioAttributes &aa);
+
             status_t doStopOutput(audio_port_handle_t portId);
             void doReleaseOutput(audio_port_handle_t portId);