Fix flaky test on ActiveDeviceManager

- Fix answers on some mock instances.
- Updeate test internal values  before sending broadcast intents.

Bug: 256684931
Tag: #refactor
Test: atest BluetoothInstrumentationTests:ActiveDeviceManagerTest (1000 times)
Change-Id: I8285dd829934fddf58af399301c2322634dba2f9
(cherry picked from commit dba9f0b6)
Merged-In: I8285dd829934fddf58af399301c2322634dba2f9