Merge "[MediaProjection] Store WindowContext in field" into sc-v2-dev

    private final Context mContext;

    private final Map<Callback, CallbackRecord> mCallbacks;

    /**

     * Store the WindowContext in a field. If it is a local variable, and it is garbage collected

     * during a MediaProjection session, the WindowContainer listener no longer exists.

     */

    @Nullable

    private Context mWindowContext;

    /** @hide */

    public MediaProjection(Context context, IMediaProjection impl) {

        mCallbacks = new ArrayMap<Callback, CallbackRecord>();

     */

    private VirtualDisplayConfig.Builder buildMirroredVirtualDisplay(@NonNull String name,

            int width, int height, int dpi) {

        Context windowContext = mContext.createWindowContext(mContext.getDisplayNoVerify(),

        mWindowContext = mContext.createWindowContext(mContext.getDisplayNoVerify(),

                TYPE_APPLICATION, null /* options */);

        final VirtualDisplayConfig.Builder builder = new VirtualDisplayConfig.Builder(name, width,

                height, dpi);

        builder.setWindowTokenClientToMirror(windowContext.getWindowContextToken());

        builder.setWindowTokenClientToMirror(mWindowContext.getWindowContextToken());

        return builder;

    }