AudioFlinger: Add client shared heap size to dump.

Test: Manual dumpsys of AudioFlinger.
Change-Id: I4156e6a4da770a58d2f2e7ab71140ce591dd98ee
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 8a32b72..33b71c5 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -566,10 +566,12 @@
     String8 result;
 
     result.append("Clients:\n");
+    result.append("   pid    heap_size\n");
     for (size_t i = 0; i < mClients.size(); ++i) {
         sp<Client> client = mClients.valueAt(i).promote();
         if (client != 0) {
-            result.appendFormat("  pid: %d\n", client->pid());
+            result.appendFormat("%6d %12zu\n", client->pid(),
+                    client->heap()->getMemoryHeap()->getSize());
         }
     }