Fix reading device caps for low latency support

This commit fixes reading device capabilities for low latency mode
support. Current implementation does not connect the AsyncChannel
needed to query for the capability, and hence the query fails.

Bug: 122848516
Bug: 34905427
Test: atest com.android.server.wifi
Test: adb shell cmd wifi force-low-latency-mode enabled
Test: Make sure the device capability is checked successfully

Change-Id: I1717d8d7689920841104c436abf1ea299af0f7d6
3 files changed