First frame is always black

[hnvmeta]

All my video records have first black frames.

[huongnv251291]

move ` mDrawer.draw(mTexId, mTexMatrix, 0);

// drawBox(); mEncoderSurface.swap();

                    // EGLFor models that hang up if you do not draw on the off screen for retention workaround
                    makeCurrent();
                    GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
                    GLES20.glFlush();`

into if (local_request_draw) for fix first frame black