Switch from Droid -> Noto for RS fonts.

Bug: 15436348
Change-Id: Ie62092538c7d865dcaba668392a4397baef725ec
diff --git a/rs/java/android/renderscript/Font.java b/rs/java/android/renderscript/Font.java
index b22aeb7..4318b9d 100644
--- a/rs/java/android/renderscript/Font.java
+++ b/rs/java/android/renderscript/Font.java
@@ -111,10 +111,10 @@
 
         FontFamily serifFamily = new FontFamily();
         serifFamily.mNames = sSerifNames;
-        serifFamily.mNormalFileName = "DroidSerif-Regular.ttf";
-        serifFamily.mBoldFileName = "DroidSerif-Bold.ttf";
-        serifFamily.mItalicFileName = "DroidSerif-Italic.ttf";
-        serifFamily.mBoldItalicFileName = "DroidSerif-BoldItalic.ttf";
+        serifFamily.mNormalFileName = "NotoSerif-Regular.ttf";
+        serifFamily.mBoldFileName = "NotoSerif-Bold.ttf";
+        serifFamily.mItalicFileName = "NotoSerif-Italic.ttf";
+        serifFamily.mBoldItalicFileName = "NotoSerif-BoldItalic.ttf";
         addFamilyToMap(serifFamily);
 
         FontFamily monoFamily = new FontFamily();