p2p: check the length of the network name bytes

Fixes: 144472136
Bug: 144472136
Test: atest FrameworksWifiApiTests
Change-Id: I80b8e0330499e6c655efb1712811891a8e8229cb
(cherry picked from commit a0900344f4ea850ca9ee81fc936298f894e77f54)
2 files changed