libgui: Enable -Weverything and -Werror

Enables -Weverything and -Werror, with just a few exceptions for
warnings we can't (or shouldn't need to) work around.

Cherry pick of I034abec27bf4020d84af60d7acc1939c59986dd6 plus a
couple of minor changes to CpuConsumer.cpp to make it work with a
prior change:
    Uncomment CC_LOGV on line 46
    Change C-style cast to static_cast on line 71

Change-Id: Iaec610477ea0122317b0578fb74caf2383d4cf08
diff --git a/services/surfaceflinger/MonitoredProducer.h b/services/surfaceflinger/MonitoredProducer.h
index f6ccc51..aec3e85 100644
--- a/services/surfaceflinger/MonitoredProducer.h
+++ b/services/surfaceflinger/MonitoredProducer.h
@@ -37,7 +37,7 @@
     virtual status_t requestBuffer(int slot, sp<GraphicBuffer>* buf);
     virtual status_t setBufferCount(int bufferCount);
     virtual status_t dequeueBuffer(int* slot, sp<Fence>* fence, bool async,
-            uint32_t w, uint32_t h, uint32_t format, uint32_t usage);
+            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 @@
     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,
-            uint32_t format, uint32_t usage);
+            PixelFormat format, uint32_t usage);
     virtual IBinder* onAsBinder();
 
 private: