Align inline image in nodes text

Summary:
This is similar to https://github.com/facebook/react-native/pull/6528
for the non-nodes inline images.

Reviewed By: dmmiller

Differential Revision: D3358530

ReactAndroid/src/main/java/com/facebook/react/flat/InlineImageSpanWithPipeline.java

@@ -158,7 +158,7 @@ import com.facebook.infer.annotation.Assertions;
       return;
     }
 
-    float bottomFloat = (float) bottom;
+    float bottomFloat = (float) bottom - paint.getFontMetricsInt().descent;
     TMP_RECT.set(x, bottomFloat - mHeight, x + mWidth, bottomFloat);
 
     canvas.drawBitmap(bitmap, null, TMP_RECT, paint);