BQ: get rid of async in producer interface

- Get rid of the async flag in dequeueBuffer, allocateBuffers,
  waitForFreeSlotThenRelock, and QueueBufferInput.
- Instead use the persistent flags mDequeueBufferCannotBlock and
  mAsyncMode to determine whether to use the async behavior.

Bug 13174928

Change-Id: Ie6f7b9e46ee3844ee77b102003c84dddf1bcafdd
diff --git a/services/surfaceflinger/MonitoredProducer.h b/services/surfaceflinger/MonitoredProducer.h
index 0bdc050..3df6f0f 100644
--- a/services/surfaceflinger/MonitoredProducer.h
+++ b/services/surfaceflinger/MonitoredProducer.h
@@ -37,8 +37,8 @@
     virtual status_t requestBuffer(int slot, sp<GraphicBuffer>* buf);
     virtual status_t setMaxDequeuedBufferCount(int maxDequeuedBuffers);
     virtual status_t setAsyncMode(bool async);
-    virtual status_t dequeueBuffer(int* slot, sp<Fence>* fence, bool async,
-            uint32_t w, uint32_t h, PixelFormat format, uint32_t usage);
+    virtual status_t dequeueBuffer(int* slot, sp<Fence>* fence, uint32_t w,
+            uint32_t h, PixelFormat format, uint32_t usage);
     virtual status_t detachBuffer(int slot);
     virtual status_t detachNextBuffer(sp<GraphicBuffer>* outBuffer,
             sp<Fence>* outFence);
@@ -52,7 +52,7 @@
             bool producerControlledByApp, QueueBufferOutput* output);
     virtual status_t disconnect(int api);
     virtual status_t setSidebandStream(const sp<NativeHandle>& stream);
-    virtual void allocateBuffers(bool async, uint32_t width, uint32_t height,
+    virtual void allocateBuffers(uint32_t width, uint32_t height,
             PixelFormat format, uint32_t usage);
     virtual status_t allowAllocation(bool allow);
     virtual status_t setGenerationNumber(uint32_t generationNumber);