Tell system server whether the app handled input events.

Refactored ViewRoot, NativeActivity and related classes to tell the
dispatcher whether an input event was actually handled by the application.

This will be used to move more of the global default key processing
into the system server instead of the application.

Change-Id: If06b98b6f45c543e5ac5b1eae2b3baf9371fba28
diff --git a/include/ui/InputDispatcher.h b/include/ui/InputDispatcher.h
index a5591ba..d09ff41 100644
--- a/include/ui/InputDispatcher.h
+++ b/include/ui/InputDispatcher.h
@@ -304,6 +304,10 @@
     virtual bool interceptKeyBeforeDispatching(const sp<InputChannel>& inputChannel,
             const KeyEvent* keyEvent, uint32_t policyFlags) = 0;
 
+    /* Allows the policy a chance to perform default processing for an unhandled key. */
+    virtual bool dispatchUnhandledKey(const sp<InputChannel>& inputChannel,
+            const KeyEvent* keyEvent, uint32_t policyFlags) = 0;
+
     /* Notifies the policy about switch events.
      */
     virtual void notifySwitch(nsecs_t when,
@@ -609,6 +613,7 @@
         sp<InputChannel> inputChannel;
         sp<InputApplicationHandle> inputApplicationHandle;
         int32_t userActivityEventType;
+        bool handled;
     };
 
     // Generic queue implementation.
@@ -1030,7 +1035,8 @@
             EventEntry* eventEntry, const InputTarget* inputTarget,
             bool resumeWithAppendedMotionSample);
     void startDispatchCycleLocked(nsecs_t currentTime, const sp<Connection>& connection);
-    void finishDispatchCycleLocked(nsecs_t currentTime, const sp<Connection>& connection);
+    void finishDispatchCycleLocked(nsecs_t currentTime, const sp<Connection>& connection,
+            bool handled);
     void startNextDispatchCycleLocked(nsecs_t currentTime, const sp<Connection>& connection);
     void abortBrokenDispatchCycleLocked(nsecs_t currentTime, const sp<Connection>& connection);
     void drainOutboundQueueLocked(Connection* connection);
@@ -1061,7 +1067,7 @@
     void onDispatchCycleStartedLocked(
             nsecs_t currentTime, const sp<Connection>& connection);
     void onDispatchCycleFinishedLocked(
-            nsecs_t currentTime, const sp<Connection>& connection);
+            nsecs_t currentTime, const sp<Connection>& connection, bool handled);
     void onDispatchCycleBrokenLocked(
             nsecs_t currentTime, const sp<Connection>& connection);
     void onANRLocked(
@@ -1073,7 +1079,9 @@
     void doNotifyInputChannelBrokenLockedInterruptible(CommandEntry* commandEntry);
     void doNotifyANRLockedInterruptible(CommandEntry* commandEntry);
     void doInterceptKeyBeforeDispatchingLockedInterruptible(CommandEntry* commandEntry);
+    void doDispatchCycleFinishedLockedInterruptible(CommandEntry* commandEntry);
     void doPokeUserActivityLockedInterruptible(CommandEntry* commandEntry);
+    void initializeKeyEvent(KeyEvent* event, const KeyEntry* entry);
 
     // Statistics gathering.
     void updateDispatchStatisticsLocked(nsecs_t currentTime, const EventEntry* entry,