Apply bilinear filtering to text.

Change-Id: I2c81ad657ee2a11a2139e0b11ae3749db54c0749
diff --git a/libs/hwui/FontRenderer.h b/libs/hwui/FontRenderer.h
index de5c019..4fb8f8d 100644
--- a/libs/hwui/FontRenderer.h
+++ b/libs/hwui/FontRenderer.h
@@ -183,14 +183,14 @@
         }
 
         bool fitBitmap(const SkGlyph& glyph, uint32_t *retOriginX, uint32_t *retOriginY) {
-            if (glyph.fHeight > mMaxHeight) {
+            if (glyph.fHeight + 2 > mMaxHeight) {
                 return false;
             }
 
-            if (mCurrentCol + glyph.fWidth < mMaxWidth) {
-                *retOriginX = mCurrentCol;
-                *retOriginY = mCurrentRow;
-                mCurrentCol += glyph.fWidth;
+            if (mCurrentCol + glyph.fWidth + 2 < mMaxWidth) {
+                *retOriginX = mCurrentCol + 1;
+                *retOriginY = mCurrentRow + 1;
+                mCurrentCol += glyph.fWidth + 2;
                 mDirty = true;
                 return true;
             }