Containments with no applets will emit uiReady now
It adds a test as well that checks if this is the case.
There is still a case where the corona doesn't emit startupCompleted()
that's when there is more than one activity, but that, as well the test
will be adressed by another patch on a different part.
Change-Id: I4d83aa612c29fb0f441d11681bc5aba241370bc3