Default setup wizard to use PIN

- Added "Screen lock options" button in PIN screen, controlled by
  extra EXTRA_SHOW_OPTIONS_BUTTON, which will create a dialog to ask
  the user to choose another screen lock type.
- Extracted ScreenLockType enum and ChooseLockGenericController that
  can be shared by ChooseLockGeneric and the dialog
  ChooseLockTypeDialogFragment.
- The intent extra EXTRA_SHOW_OPTIONS_BUTTON will be set if
  ChooseLockGeneric screen starts ChooseLockPassword /
  ChooseLockPattern without asking the user. (Although the extra is
  ignored by ChooseLockPattern currently)
- Fix layout alignment for the password entry field to remove the
  extra 4dp padding on the sides.

Test: cd tests/robotests && mma
Bug: 35442933
Bug: 38002299
Change-Id: I877fbe08a0c05bb97175e1cbf0260ea6dbda22e2

src/com/android/settings/password/ChooseLockPassword.java

@@ -28,6 +28,7 @@ import android.app.admin.DevicePolicyManager;
 import android.app.admin.PasswordMetrics;
 import android.content.Context;
 import android.content.Intent;
+import android.graphics.Insets;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
@@ -171,7 +172,7 @@ public class ChooseLockPassword extends SettingsActivity {
         private int mPasswordMinNumeric = 0;
         private int mPasswordMinNonLetter = 0;
         private int mPasswordMinLengthToFulfillAllPolicies = 0;
-        private int mUserId;
+        protected int mUserId;
         private boolean mHideDrawer = false;
         /**
          * Password requirements that we need to verify.
@@ -188,7 +189,7 @@ public class ChooseLockPassword extends SettingsActivity {
         private TextView mHeaderText;
         private String mFirstPin;
         private RecyclerView mPasswordRestrictionView;
-        private boolean mIsAlphaMode;
+        protected boolean mIsAlphaMode;
         private Button mCancelButton;
         private Button mNextButton;
 
@@ -291,6 +292,11 @@ public class ChooseLockPassword extends SettingsActivity {
         public void onViewCreated(View view, Bundle savedInstanceState) {
             super.onViewCreated(view, savedInstanceState);
 
+            // Make the password container consume the optical insets so the edit text is aligned
+            // with the sides of the parent visually.
+            ViewGroup container = view.findViewById(R.id.password_container);
+            container.setOpticalInsets(Insets.NONE);
+
             mCancelButton = (Button) view.findViewById(R.id.cancel_button);
             mCancelButton.setOnClickListener(this);
             mNextButton = (Button) view.findViewById(R.id.next_button);