Add boolean resource isDefault=true for all supported locales

Bug: 7115368
Change-Id: I390d52d10d6c7d1639f73255ace9985886ea2157
diff --git a/java/res/values/bools.xml b/java/res/values/bools.xml
index 0069596..10d2179 100644
--- a/java/res/values/bools.xml
+++ b/java/res/values/bools.xml
@@ -19,6 +19,6 @@
 -->
 <resources>
     <!-- Whether this input method should be used as the default for a locale. Override it
-         for latin languages. -->
+         for supported languages. -->
     <bool name="im_is_default">false</bool>
 </resources>