Minor APM dump improvements

- print system usages as enum strings;
- indicate that the 'id' of the communication strategy is
  printed;
- add accidentally removed "is soundtrigger" flag to
  RecordClientDescriptor.

Bug: 205884982
Test: adb shell dumpsys media.audio_policy
Change-Id: Iccb847c971864e4781ccc92cbf078303ef35d51b
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index e08ed2a..fd42229 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -3706,7 +3706,7 @@
     }
     dst->appendFormat(" TTS output %savailable\n", mTtsOutputAvailable ? "" : "not ");
     dst->appendFormat(" Master mono: %s\n", mMasterMono ? "on" : "off");
-    dst->appendFormat(" Communnication Strategy: %d\n", mCommunnicationStrategy);
+    dst->appendFormat(" Communication Strategy id: %d\n", mCommunnicationStrategy);
     dst->appendFormat(" Config source: %s\n", mConfig.getSource().c_str()); // getConfig not const
 
     dst->append("\n");