Resolve the deadlock caused by unfreezeProcess().

Restore unfreezeProcess() to previous "quick unfreeze" code, also add a
quick logging for REPORT_UNFREEZE_MSG.

Bug: 244113346
Test: statsd_testdrive 254
Change-Id: I30f0d969a7f540ea6f4a392a904b59692c7e4d72

services/core/java/com/android/server/am/CachedAppOptimizer.java

@@ -1351,7 +1351,18 @@ public final class CachedAppOptimizer {
                 return;
             }
             Slog.d(TAG_AM, "quick sync unfreeze " + pid);
-            unfreezeAppLSP(app, reason);
+            try {
+                freezeBinder(pid, false);
+            } catch (RuntimeException e) {
+                Slog.e(TAG_AM, "Unable to quick unfreeze binder for " + pid);
+                return;
+            }
+
+            try {
+                Process.setProcessFrozen(pid, app.uid, false);
+            } catch (Exception e) {
+                Slog.e(TAG_AM, "Unable to quick unfreeze " + pid);
+            }
         }
     }