Add textFontWeight attribute to documentation

Bug: N/A
Test: m docs and manually verified
Change-Id: Ic2aca1503789c9ce426b3de3b887983ade292afe
diff --git a/core/java/android/widget/TextView.java b/core/java/android/widget/TextView.java
index 4ea2ced..9a60065 100644
--- a/core/java/android/widget/TextView.java
+++ b/core/java/android/widget/TextView.java
@@ -247,6 +247,7 @@
  * @attr ref android.R.styleable#TextView_textColorHint
  * @attr ref android.R.styleable#TextView_textAppearance
  * @attr ref android.R.styleable#TextView_textColorLink
+ * @attr ref android.R.styleable#TextView_textFontWeight
  * @attr ref android.R.styleable#TextView_textSize
  * @attr ref android.R.styleable#TextView_textScaleX
  * @attr ref android.R.styleable#TextView_fontFamily