fix [3367893] Rotating device on YouTube's home screen several times kills system_server

A typo in RS tear down cause caused eglMakeCurrent to fail. Additionnaly,
EGLSurfaces where not destroyed explicitely.
Everything worked properly when only one RS context was used, as
eglTerminate() would clean-up everything.

however in the present case, there seem to be more than one RS context
and eglTerminate() is not called.

Change-Id: I37a10945b9c0a85c4f7abad1c4f4c24bc0daa0a5