androiddeployqt: Add OpenGL dependency to manifest if necessary

In order to filter out devices that do not support OpenGLES 2 in
Google Play, we need to report that we depend on it when using
Qt Quick or Qt OpenGL. It would have been more generic to add the
information to the meta-data in the module, but since we already
have the information there, just in the form of forcing the
use of the GL plugin, we might as well use that and not complicate
the dependency XMLs any further.

Task-number: QTBUG-32491
Change-Id: I2af044be010fcd0a8076906de6385701041b9c01
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>