Validate NetworkCapabilities on unparceling

(and also on parceling, which is not really essential, but
still feels better)
This will avoid issues with NC objects unparceled by processes
when the sender was malicious.

Test: FrameworksNetTests
Bug: 246542132
Bug: 246542330
Change-Id: I8b40eb0c11e39b98bce23dc4e3df037c04639000
1 file changed