Wifi: fix bug during WIFI HAL stop

In WifiChip::invalidateAndRemoveDependencies, the
iterator was not implemented correctly as it was
deleting objects while iterating. This could cause
the entire WIFI HAL to be restarted when disabling
WIFI.

Bug: 146922967
Test: atest VtsHalWifiV1_0TargetTest VtsHalWifiNanV1_0TargetTest VtsHalWifiApV1_0TargetTest \
            VtsHalWifiV1_1TargetTest \
            VtsHalWifiV1_2TargetTest VtsHalWifiNanV1_2TargetTest \
            VtsHalWifiV1_3TargetTest \
            VtsHalWifiApV1_4TargetTest VtsHalWifiNanV1_4TargetTest VtsHalWifiRttV1_4TargetTest
Change-Id: Id86f1a662684467d3b86a79b271144ac3055d0a0