AudioPolicy: several spatializer output management fixes

Apply several fixes for spatializer output management when
the spatializer can be attached to two hardware modules (for instance
the primary and Bluetooth hardware modules).

- in getSpatializerOutput() open the output with
openOutputWithProfileAndDevice() to properly create the duplicating
output if needed and handle dynamic audio profiles.
- in openOutputWithProfileAndDevice(), do not open a duplicating output
for outputs opened on the primary module.
- in closeOutput(), clear mSpatializerOutput if this is the output being
closed.
- Allow canBeSpatialized() to ignore config matching with opened mSpatializerOutput
when not required.
- Force multichannel mixer mask in SwAudioOutputDescriptor::open() when
opening a spatializer output and the mixer config is not specified.

Bug: 210803914
Test: spatializer over Bluetooth A2DP
Change-Id: I1c5ca3ce0a230d674f3a22fcb1fe1d904665efe9
diff --git a/services/audiopolicy/service/Spatializer.cpp b/services/audiopolicy/service/Spatializer.cpp
index 0fdbe20..54d9094 100644
--- a/services/audiopolicy/service/Spatializer.cpp
+++ b/services/audiopolicy/service/Spatializer.cpp
@@ -227,12 +227,8 @@
     if (status != NO_ERROR) {
         return status;
     }
-    status = getHalParameter<true>(effect, SPATIALIZER_PARAM_SUPPORTED_CHANNEL_MASKS,
+    return getHalParameter<true>(effect, SPATIALIZER_PARAM_SUPPORTED_CHANNEL_MASKS,
                                  &mChannelMasks);
-    if (status != NO_ERROR) {
-        return status;
-    }
-    return NO_ERROR;
 }
 
 /** Gets the channel mask, sampling rate and format set for the spatializer input. */