Fix leak on density change.

    private ViewGroup mDialogContentView;

    private ImageButton mExpandButton;

    private final List<VolumeRow> mRows = new ArrayList<>();

    private final SpTexts mSpTexts;

    private SpTexts mSpTexts;

    private final SparseBooleanArray mDynamic = new SparseBooleanArray();

    private final KeyguardManager mKeyguard;

    private final AudioManager mAudioManager;

    private final AccessibilityManager mAccessibilityMgr;

    private int mExpandButtonAnimationDuration;

    private ZenFooter mZenFooter;

    private final LayoutTransition mLayoutTransition;

    private LayoutTransition mLayoutTransition;

    private final Object mSafetyWarningLock = new Object();

    private final Accessibility mAccessibility = new Accessibility();

    private final ColorStateList mActiveSliderTint;

        mCallback = callback;

        mWindowType = windowType;

        mZenModeController = zenModeController;

        mSpTexts = new SpTexts(mContext);

        mKeyguard = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);

        mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);

        mAccessibilityMgr = (AccessibilityManager) mContext.getSystemService(Context.ACCESSIBILITY_SERVICE);

        mActiveSliderTint = loadColorStateList(R.color.system_accent_color);

        mInactiveSliderTint = loadColorStateList(R.color.volume_slider_inactive);

        mLayoutTransition = new LayoutTransition();

        mLayoutTransition.setDuration(new ValueAnimator().getDuration() / 2);

        initDialog();

    private void initDialog() {

        mDialog = new CustomDialog(mContext);

        mSpTexts = new SpTexts(mContext);

        mLayoutTransition = new LayoutTransition();

        mLayoutTransition.setDuration(new ValueAnimator().getDuration() / 2);

        mHovering = false;

        mShowing = false;

        final Window window = mDialog.getWindow();