audio: Add supportsBluetoothVariableLatency API to IModule

Add API to query if the Module supports control of variable latency over
playback paths.

Bug: 197823000
Test: atest VtsHalAudioCoreTargetTest
Change-Id: I3a08d682a1a639d8373869725e12702fff962d53
diff --git a/audio/aidl/default/Module.cpp b/audio/aidl/default/Module.cpp
index 9ca26d2..40d32b3 100644
--- a/audio/aidl/default/Module.cpp
+++ b/audio/aidl/default/Module.cpp
@@ -1145,4 +1145,10 @@
     return ndk::ScopedAStatus::ok();
 }
 
+ndk::ScopedAStatus Module::supportsVariableLatency(bool* _aidl_return) {
+    LOG(DEBUG) << __func__;
+    *_aidl_return = false;
+    return ndk::ScopedAStatus::ok();
+}
+
 }  // namespace aidl::android::hardware::audio::core