Log firmware alert to disconnect metrics

Add a new reason to track firmware alert related wifi disconnects, as
well as the specific firmware alert reason code.

Flag: EXEMPT metric
Bug: 409414902
Test: atest com.android.server.wifi
Change-Id: Icd8d96ff75524343ccf257483fd4425da6fd8b9b
1 file changed
tree: cc5692b3bc1ba2c46ee01c8ff6220bdd9c8396f3
  1. stats/
  2. OWNERS