[AWARE] Remove (hide) sendMessage with retryCount API

Remove the sendMessage(..., retryCount) API (the version
without retryCount) remains. Baseline API already retries
transmissions (at the PHY/MAC layers) - no reason to add
framework-layer retries.

Bug: 35755823
Test: unit tests and integration (sl4a) tests
Change-Id: I49d8bd1e836c09d56f3a9343313f5647eac5c32d
5 files changed