fix emoji resizing in EditTexts

fixes #3720
closes #3741
// FREEBIE

src/org/thoughtcrime/securesms/components/emoji/EmojiSpan.java

@@ -1,5 +1,6 @@
 package org.thoughtcrime.securesms.components.emoji;
 
+import android.graphics.Paint;
 import android.graphics.Paint.FontMetricsInt;
 import android.graphics.drawable.Drawable;
 import android.support.annotation.NonNull;
@@ -15,4 +16,10 @@ public class EmojiSpan extends AnimatingImageSpan {
                                 : tv.getResources().getDimensionPixelSize(R.dimen.conversation_item_body_text_size);
     getDrawable().setBounds(0, 0, size, size);
   }
+
+  @Override public int getSize(Paint paint, CharSequence text, int start, int end,
+                               FontMetricsInt fm)
+  {
+    return getDrawable().getBounds().right;
+  }
 }