Add a settings activity for the spell checker.

Bug: 5156940
Change-Id: I762de1296f861abce2d0413404bca54571e0ea0a
diff --git a/java/proguard.flags b/java/proguard.flags
index 3959500..33af890 100644
--- a/java/proguard.flags
+++ b/java/proguard.flags
@@ -27,6 +27,10 @@
   *;
 }
 
+-keep class com.android.inputmethod.latin.spellcheck.SpellCheckerSettingsFragment {
+  *;
+}
+
 -keep class com.android.inputmethod.latin.SettingsActivity {
   *;
 }