AudioPolicy: Reuse SortedVector comparison from AudioProfile

Operation for comparing sorted vectors was defined twice in APM code:
once in AudioProfile.h as operator==, then in APM as 'vectorsEqual'
method. Remove the latter and use the operator instead.

Test: make
Change-Id: I0697843aabb13539b7b552773d96dbb7fb56daa4
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.h b/services/audiopolicy/managerdefault/AudioPolicyManager.h
index 70ca39f..e412645 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.h
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.h
@@ -39,6 +39,7 @@
 #include <AudioPolicyConfig.h>
 #include <AudioPort.h>
 #include <AudioPatch.h>
+#include <AudioProfile.h>
 #include <DeviceDescriptor.h>
 #include <IOProfile.h>
 #include <HwModule.h>
@@ -459,8 +460,6 @@
 
         SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device,
                                                             const SwAudioOutputCollection& openOutputs);
-        bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
-                                           SortedVector<audio_io_handle_t>& outputs2);
 
         // mute/unmute strategies using an incompatible device combination
         // if muting, wait for the audio in pcm buffer to be drained before proceeding