Paramaterize and adjust the glyph cache sizes

Add new parameters for the texture size used for the larger, fallback caches.
Bump up the defaults in some situations.

Issue #7045164 Adjust cache sizes for manta

Change-Id: I562118ce785d7f8b6e445178878672e9709d25f2
diff --git a/libs/hwui/FontRenderer.h b/libs/hwui/FontRenderer.h
index 8d0d21d..241b73e 100644
--- a/libs/hwui/FontRenderer.h
+++ b/libs/hwui/FontRenderer.h
@@ -391,6 +391,8 @@
 
     uint32_t mSmallCacheWidth;
     uint32_t mSmallCacheHeight;
+    uint32_t mLargeCacheWidth;
+    uint32_t mLargeCacheHeight;
 
     Vector<CacheTexture*> mCacheTextures;