Add synchronization when EventFlagQueue is created in sensors HAL init

Bug: 380191409
Test: atest VtsAidlHalSensorsTargetTest:Sensors/SensorsAidlTest#CleanupConnectionsOnInitialize/0_android_hardware_sensors_ISensors_default --rerun-until-failure=200 pass

Change-Id: Ia22cf0278acb7e1b7cc62a75926ffc5aa47610eb
1 file changed