Update the proximity feature to return proximity levels

The original proximity feature which returned the distance in meters was
determined to be too privacy-invasive. AttentionManagerService continue
to receive proximity in distance from Attention Service, but
HotwordDetectedResult will map it
to different proximity levels, near and far. These proximity levels will be used in HotwordDetectionConnection. Use a RequiredServiceRule to make sure we only run the test if the device has the attention service

Bug: 253326426
Test: atest CtsVoiceInteractionTestCases
Change-Id: I4d55564c39d48dd1869d747beb37f81170c102f6
Merged-In: I4d55564c39d48dd1869d747beb37f81170c102f6