This change updates the VPN state when IKEv2 sessions fail, and when configuration errors occur. Bug: 162289824 Test: Manual testing with IKEv2/PSK Change-Id: I2e8c6f421d2898f97b0ac422b2276edf9ef923f1 Merged-In: I2e8c6f421d2898f97b0ac422b2276edf9ef923f1 (cherry picked from commit 0be82d4f4cb215e05ca62df80f6a9e652d1d1aa9)