SAP : Prevent crash during turn on Airplane mode

Use Case:
1. Initiate SAP connection from Remote Device.
2. Turn on Airplane mode to disable BT when SAP Client
   is connected on DUT.
3. Repeat steps 1 and 2.

Error log :

Line 16: 03-13 13:57:31.559  3368  3569 V SapServer: in sendDisconnectInd()
Line 17: 03-13 13:57:31.559  3368  3569 D SapServer: Cleaning up before force disconnecting rfcomm
Line 19: 03-13 13:57:31.559  3368  3569 D SapServer: Waiting for deinit to complete
Line 20: 03-13 13:57:31.563  3368  3386 W BluetoothAdapterService: setProfileServiceState() -
Stopping service com.android.bluetooth.sap.SapService
Line 33: 03-13 13:57:31.936  3368  3368 W BluetoothAdapterService: onProfileServiceStateChange() -
Profile still running: com.android.bluetooth.sap.SapService
Line 34: 03-13 13:57:31.937  3368  3368 W BluetoothAdapterService: onProfileServiceStateChange()
serviceName=com.android.bluetooth.sap.SapService, state=10, doUpdate=true
Line 42: 03-13 13:57:32.310  3368  3569 E AndroidRuntime: java.lang.IllegalArgumentException:
Receiver not registered: com.android.bluetooth.sap.SapServer$1@dbf974b
Line 46: 03-13 13:57:32.310  3368  3569 E AndroidRuntime:    at com.android.bluetooth.sap.
SapServer.run(SapServer.java:463)
Line 46: 03-13 13:57:32.310  3368  3569 E AndroidRuntime:    at com.android.bluetooth.sap.
SapServer.run(SapServer.java:463)
Line 46: 03-13 13:57:32.310  3368  3569 E AndroidRuntime:    at com.android.bluetooth.sap.
SapServer.run(SapServer.java:463)

Failure:
"Unfortunately, Bluetooth share has stopped" error comes.

Root cause :
RIL Deinit is not completed because of un-expected turn of BT.

Fix:
Decrement the count of the latch, to release all waiting threads
when BT is turned off during active sap connection.

Test: Checked manually if no crash in BT as per above usecase.

Bug: 62411305
Change-Id: Ib36430c56935efa9de5ce7f8b18eddc9cea47662