Check silent mode when updating output device.

After refactoring audio device type, the output devices will only be set
when create/release audio patch. In that case, the output devices are
empty when creating the thread. If the "ro.audio.silent" is set, it will
make master muted if the output devices are empty. To fix the issue, do
not check silent mode when the output devices are empty, but check
silent mode when output devices are updated.

Test: atest AudioHostTest with setting "ro.audio.silent"
Bug: 154037767
Change-Id: I6cb219353e541ba99ba9acebd6ce853128d963d3
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 105fa14..5d9c35a 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -3051,6 +3051,10 @@
 {
     if (!mMasterMute) {
         char value[PROPERTY_VALUE_MAX];
+        if (mOutDeviceTypeAddrs.empty()) {
+            ALOGD("ro.audio.silent is ignored since no output device is set");
+            return;
+        }
         if (isSingleDeviceType(outDeviceTypes(), AUDIO_DEVICE_OUT_REMOTE_SUBMIX)) {
             ALOGD("ro.audio.silent will be ignored for threads on AUDIO_DEVICE_OUT_REMOTE_SUBMIX");
             return;
@@ -4227,6 +4231,7 @@
                          (mPatch.sinks[0].id != sinkPortId);
     mPatch = *patch;
     mOutDeviceTypeAddrs = deviceTypeAddrs;
+    checkSilentMode_l();
 
     if (mOutput->audioHwDev->supportsAudioPatches()) {
         sp<DeviceHalInterface> hwDevice = mOutput->audioHwDev->hwDevice();
@@ -9153,6 +9158,7 @@
         if (isOutput()) {
             sendIoConfigEvent_l(AUDIO_OUTPUT_CONFIG_CHANGED);
             mOutDeviceTypeAddrs = sinkDeviceTypeAddrs;
+            checkSilentMode_l();
         } else {
             sendIoConfigEvent_l(AUDIO_INPUT_CONFIG_CHANGED);
             mInDeviceTypeAddr = sourceDeviceTypeAddr;