Update typeId for BufferQueueLayer and BufferStateLayer

Currently BufferQueueLayer and BufferStateLayer have typeId BufferLayer.
Changed to use more specific typeIds so they can be identified when
dumping state.

Also renamed getTypeId to getType since it was not returning an ID, but
rather a char* name

Test: adb shell dumpsys SurfaceFlinger
Change-Id: Ic80e995fa37acb2a9f21ea91bae8608657bf0bf1
diff --git a/services/surfaceflinger/BufferQueueLayer.h b/services/surfaceflinger/BufferQueueLayer.h
index 392b706..3bc625e 100644
--- a/services/surfaceflinger/BufferQueueLayer.h
+++ b/services/surfaceflinger/BufferQueueLayer.h
@@ -38,6 +38,8 @@
     // Interface implementation for Layer
     // -----------------------------------------------------------------------
 public:
+    const char* getType() const override { return "BufferQueueLayer"; }
+
     void onLayerDisplayed(const sp<Fence>& releaseFence) override;
 
     void setTransformHint(uint32_t orientation) const override;