Expose (internally only) the number of animations currently running.

This will be used for StrictMode to annotate violations with
whether or not they janked up an animation.

Change-Id: I5bc691f49b74c45279cd2ae044d2a81dcf1204a9
diff --git a/services/java/com/android/server/am/ActivityManagerService.java b/services/java/com/android/server/am/ActivityManagerService.java
index de2e965..8d36e4f 100644
--- a/services/java/com/android/server/am/ActivityManagerService.java
+++ b/services/java/com/android/server/am/ActivityManagerService.java
@@ -6676,6 +6676,9 @@
             if (info.violationNumThisLoop != 0) {
                 sb.append("Loop-Violation-Number: ").append(info.violationNumThisLoop).append("\n");
             }
+            if (info.numAnimationsRunning != 0) {
+                sb.append("Animations-Running: ").append(info.numAnimationsRunning).append("\n");
+            }
             if (info != null && info.durationMillis != -1) {
                 sb.append("Duration-Millis: ").append(info.durationMillis).append("\n");
             }