audio policy: fix output stream selection

Make sure that all outputs considered by selectOutput()
when called from AudioPolicyManager::getOutputForDevice()
support the requested audio format.

Bug: 17340382.
Change-Id: I76520ce60e9a8fe4d2d23125d6143bb016522754
diff --git a/services/audiopolicy/AudioPolicyManager.h b/services/audiopolicy/AudioPolicyManager.h
index 57e015e..da0d95d 100644
--- a/services/audiopolicy/AudioPolicyManager.h
+++ b/services/audiopolicy/AudioPolicyManager.h
@@ -713,7 +713,8 @@
                                             uint32_t delayMs);
 
         audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs,
-                                       audio_output_flags_t flags);
+                                       audio_output_flags_t flags,
+                                       audio_format_t format);
         // samplingRate parameter is an in/out and so may be modified
         sp<IOProfile> getInputProfile(audio_devices_t device,
                                    uint32_t& samplingRate,