SurfaceComposerClient: Ensure createSurface returns error codes.

If SurfaceComposerClient::mStatus is not equal to NO_ERROR (for example
because we have attempted to construct a rooted-connection to a destroyed
surface, and initialization has failed) then it is possible for createSurface
to return NO_ERROR while failing to assign a value to outSurface. This
violates the expectations of the JNI layer which expects that NO_ERROR will
result in a valid surface.

Bug: 76231383
Test: Surface_test.cpp (libgui_test)
Change-Id: Ie68aafad01674c43e13af09bc144cc673b84ac1b