Add API for NAN suspension support in framework Capabilities

The API returns true only when the feature flag for suspension is enabled and the HAL supports NAN suspension.

API-Coverage-Bug: 263295618
Test: atest com.android.server.wifi, android.net.wifi
Bug: 262872127
Change-Id: I2295cce0ca4cd548df23dd3136a03669618dd14f
7 files changed