Prevent VvmNetworkRequestCallback from releasing twice

It is unclear from the docs or implementation what callbacks are invoked when the network is lost, or does the system release the callback for us somewhere else. In this CL VvmNetworkRequestCallback.releaseNetwork() will be guarded from calling twice, and log levels for callbacks are raised.

Bug: 64243619
Test: N/A, repro steps unknown.
PiperOrigin-RevId: 183298754
Change-Id: I5e589b2b59478b270890056fa08abb306ee1600c
1 file changed