Delete all ro.hwui.* props

Remove all ro.hwui.* tuning props and instead
calculate them from the screen resolution.

Or just hardcode them to what all devices
were hardcoding them to anyway.

Bug: 63741221
Test: Check cache size results on sailfish

Change-Id: I8b0d210572a246f4fefb076935cf5156a70c274c
diff --git a/libs/hwui/renderstate/RenderState.h b/libs/hwui/renderstate/RenderState.h
index 4b7a865..df81e86 100644
--- a/libs/hwui/renderstate/RenderState.h
+++ b/libs/hwui/renderstate/RenderState.h
@@ -113,7 +113,7 @@
     Scissor& scissor() { return *mScissor; }
     Stencil& stencil() { return *mStencil; }
 
-    OffscreenBufferPool& layerPool() { return mLayerPool; }
+    OffscreenBufferPool& layerPool() { return *mLayerPool; }
 
     GrContext* getGrContext() const;
 
@@ -136,7 +136,7 @@
     Scissor* mScissor = nullptr;
     Stencil* mStencil = nullptr;
 
-    OffscreenBufferPool mLayerPool;
+    OffscreenBufferPool* mLayerPool = nullptr;
 
     std::set<Layer*> mActiveLayers;
     std::set<DeferredLayerUpdater*> mActiveLayerUpdaters;