ContextHubService: Reconnect host endpoints after HAL is restarted

Test: Observed the change via adb shell dumpsys and logcat
Flag: android.chre.flags.reconnect_host_endpoints_after_hal_restart
Bug: 348253728
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:5262ed83a9456bd05ac1c7041b4963bbbf4c105d)
Merged-In: I4ecc107cf7775f2cc502d5a94c614dd7e67c7cc6
Change-Id: I4ecc107cf7775f2cc502d5a94c614dd7e67c7cc6