Add support for Telecom analytics extensions

Add classes for call events and a field for them in
ParcelableCallAnalytics.
Add classes for timing information on user-visible operations.
Add the TelecomAnalytics class as the top-level object for analytics.
Add log session timing information to the TelecomAnalytics class,
independent of individual calls.

Bug: 28623064
Change-Id: Ifee5fdf6b6b341869ff0ff26c4388d357e3d9922

telecomm/java/android/telecom/TelecomManager.java

@@ -1443,9 +1443,9 @@ public class TelecomManager {
      */
     @SystemApi
     @RequiresPermission(Manifest.permission.DUMP)
-    public List<ParcelableCallAnalytics> dumpAnalytics() {
+    public TelecomAnalytics dumpAnalytics() {
         ITelecomService service = getTelecomService();
-        List<ParcelableCallAnalytics> result = null;
+        TelecomAnalytics result = null;
         if (service != null) {
             try {
                 result = service.dumpCallAnalytics();