BufferQueue improvements and APIs changes

this is the first step of a series of improvements to
BufferQueue. A few things happen in this change:

- setSynchronousMode() goes away as well as the SynchronousModeAllowed flag
- BufferQueue now defaults to (what used to be) synchronous mode
- a new "controlled by app" flag is passed when creating consumers and producers
  those flags are used to put the BufferQueue in a mode where it
  will never block if both flags are set. This is achieved by:
  - returning an error from dequeueBuffer() if it would block
  - making sure a buffer is always available by replacing
    the previous buffer with the new one in queueBuffer()
    (note: this is similar to what asynchrnous mode used to be)

Note: in this change EGL's swap-interval 0 is broken; this will be
fixed in another change.

Change-Id: I691f9507d6e2e158287e3039f2a79a4d4434211d
diff --git a/include/gui/IGraphicBufferProducer.h b/include/gui/IGraphicBufferProducer.h
index 29c7ff3..af5fcfc 100644
--- a/include/gui/IGraphicBufferProducer.h
+++ b/include/gui/IGraphicBufferProducer.h
@@ -171,13 +171,6 @@
     // 'what' tokens allowed are that of android_natives.h
     virtual int query(int what, int* value) = 0;
 
-    // setSynchronousMode set whether dequeueBuffer is synchronous or
-    // asynchronous. In synchronous mode, dequeueBuffer blocks until
-    // a buffer is available, the currently bound buffer can be dequeued and
-    // queued buffers will be retired in order.
-    // The default mode is asynchronous.
-    virtual status_t setSynchronousMode(bool enabled) = 0;
-
     // connect attempts to connect a client API to the IGraphicBufferProducer.
     // This must be called before any other IGraphicBufferProducer methods are
     // called except for getAllocator.
@@ -188,7 +181,7 @@
     // outWidth, outHeight and outTransform are filled with the default width
     // and height of the window and current transform applied to buffers,
     // respectively.
-    virtual status_t connect(int api, QueueBufferOutput* output) = 0;
+    virtual status_t connect(int api, bool producerControlledByApp, QueueBufferOutput* output) = 0;
 
     // disconnect attempts to disconnect a client API from the
     // IGraphicBufferProducer.  Calling this method will cause any subsequent