Do not display keyboard when entering blocked users page.

Fixes #12241

app/src/main/AndroidManifest.xml

@@ -541,6 +541,7 @@
 
     <activity android:name=".blocked.BlockedUsersActivity"
               android:theme="@style/TextSecure.LightTheme"
+              android:windowSoftInputMode="stateHidden"
               android:configChanges="touchscreen|keyboard|keyboardHidden|orientation|screenLayout|screenSize"/>
 
     <activity android:name=".scribbles.ImageEditorStickerSelectActivity"

app/src/main/java/org/thoughtcrime/securesms/blocked/BlockedUsersActivity.java

@@ -24,6 +24,7 @@ import org.thoughtcrime.securesms.recipients.Recipient;
 import org.thoughtcrime.securesms.recipients.RecipientId;
 import org.thoughtcrime.securesms.util.DynamicNoActionBarTheme;
 import org.thoughtcrime.securesms.util.DynamicTheme;
+import org.thoughtcrime.securesms.util.ViewUtil;
 
 import java.util.Optional;
 import java.util.function.Consumer;
@@ -69,6 +70,7 @@ public class BlockedUsersActivity extends PassphraseRequiredActivity implements
         contactFilterView.focusAndShowKeyboard();
       } else {
         contactFilterView.setVisibility(View.GONE);
+        ViewUtil.hideKeyboard(this, contactFilterView);
       }
     });