Avoid launching Wi-Fi details settings if WifiEntry key is lost

- When restarting Wi-Fi details settings from the recent apps, the extra data of the sent Intent may be lost, resulting in the loss of the necessary WifiEntry key

- Don't launch Wi-Fi details settings and remove it from recent apps in the above case

Fix: 349180072
Flag: EXEMPT bugfix
Test: Manual testing
Change-Id: Ifa9718b0197ab27b77c24b706f7974a664980fba