Launcher3: Can't search out local app by Chinese

Description:
Chinese content type is Character.OTHER_LETTER.
When key matches,it check the content type. And
if type is Character.OTHER_LETTER, it doesn't
support search and break.

When the content type is Character.OTHER_LETTER,
make it work normally.

Bug: 63534074
Change-Id: I3713f24c9206fe16a8da2a23e6c90d68079dd533

src/com/android/launcher3/allapps/search/DefaultAppSearchAlgorithm.java

@@ -132,7 +132,8 @@ public class DefaultAppSearchAlgorithm implements SearchAlgorithm {
                 // Always a break point for a symbol
                 return true;
             default:
-                return false;
+                // Always a break point at first character
+                return  prevType == Character.UNASSIGNED;
         }
     }
 }