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
diff --git a/rsContext.cpp b/rsContext.cpp
index 2e0c491..98f30ae 100644
--- a/rsContext.cpp
+++ b/rsContext.cpp
@@ -253,7 +253,11 @@
     LOGV("%p, deinitEGL", this);
 
     if (mEGL.mContext != EGL_NO_CONTEXT) {
-        eglMakeCurrent(mEGL.mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, mEGL.mContext);
+        eglMakeCurrent(mEGL.mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+        eglDestroySurface(mEGL.mDisplay, mEGL.mSurfaceDefault);
+        if (mEGL.mSurface != EGL_NO_SURFACE) {
+            eglDestroySurface(mEGL.mDisplay, mEGL.mSurface);
+        }
         eglDestroyContext(mEGL.mDisplay, mEGL.mContext);
         checkEglError("eglDestroyContext");
     }