Don't override EXTRA_SHOW_FRAGMENT if exists

Bug: 8541190
Change-Id: I37d3de12558efd55f157389d2e0b51fc83dc5da1

java/src/com/android/inputmethod/latin/SettingsActivity.java

@@ -25,7 +25,10 @@ public final class SettingsActivity extends PreferenceActivity {
     @Override
     public Intent getIntent() {
         final Intent intent = super.getIntent();
-        intent.putExtra(EXTRA_SHOW_FRAGMENT, DEFAULT_FRAGMENT);
+        final String fragment = intent.getStringExtra(EXTRA_SHOW_FRAGMENT);
+        if (fragment == null) {
+            intent.putExtra(EXTRA_SHOW_FRAGMENT, DEFAULT_FRAGMENT);
+        }
         intent.putExtra(EXTRA_NO_HEADERS, true);
         return intent;
     }