Cleanups in LatinIME native source code

Change-Id: I9b5e57583deb2d0c980e66c3dfbfd1e12734bc8e
diff --git a/native/jni/src/char_utils.h b/native/jni/src/char_utils.h
index 20cf2e8..9008e36 100644
--- a/native/jni/src/char_utils.h
+++ b/native/jni/src/char_utils.h
@@ -67,5 +67,11 @@
 inline static unsigned short toBaseLowerCase(const unsigned short c) {
     return toLowerCase(toBaseChar(c));
 }
+
+inline static bool isSkippableChar(const uint16_t character) {
+    // TODO: Do not hardcode here
+    return character == '\'' || character == '-';
+}
+
 } // namespace latinime
 #endif // LATINIME_CHAR_UTILS_H