Update Naskh font names to match upstream and add Tibetan.

The latest files from the upstream Noto repository are named
NotoNaskhArabic* instead of the previous NotoNaskh*.

Also, Noto Sans Tibetan is now included in the fallback chain. Apart
from supporting Tibetan and Dzongkha langauges, this adds a character
(U+0FD6) that completes coverage for ARIB character sets.

Bug: 13680438
Bug: 18181755
Bug: 18639453
Bug: 19390244
Change-Id: I09b493340d1453ef61b08c841e1731119d645822
diff --git a/data/fonts/fonts.xml b/data/fonts/fonts.xml
index f903aab..62da0ff 100644
--- a/data/fonts/fonts.xml
+++ b/data/fonts/fonts.xml
@@ -94,12 +94,12 @@
 
     <!-- fallback fonts -->
     <family variant="elegant">
-        <font weight="400" style="normal">NotoNaskh-Regular.ttf</font>
-        <font weight="700" style="normal">NotoNaskh-Bold.ttf</font>
+        <font weight="400" style="normal">NotoNaskhArabic-Regular.ttf</font>
+        <font weight="700" style="normal">NotoNaskhArabic-Bold.ttf</font>
     </family>
     <family variant="compact">
-        <font weight="400" style="normal">NotoNaskhUI-Regular.ttf</font>
-        <font weight="700" style="normal">NotoNaskhUI-Bold.ttf</font>
+        <font weight="400" style="normal">NotoNaskhArabicUI-Regular.ttf</font>
+        <font weight="700" style="normal">NotoNaskhArabicUI-Bold.ttf</font>
     </family>
     <family>
         <font weight="400" style="normal">NotoSansEthiopic-Regular.ttf</font>
@@ -320,6 +320,9 @@
         <font weight="400" style="normal">NotoSansTaiViet-Regular.ttf</font>
     </family>
     <family>
+        <font weight="400" style="normal">NotoSansTibetan-Regular.ttf</font>
+    </family>
+    <family>
         <font weight="400" style="normal">NotoSansTifinagh-Regular.ttf</font>
     </family>
     <family>