sf: Remember that AIDL Power HAL isn't present

Updates PowerAdvisor to cache if the AIDL Power HAL isn't available, so
it doesn't continuously try to find it if there isn't a Power HAL 1.3
implementation to fall back to.

Bug: 150442909
Test: Manual, no vintf logspam on a device with Power HAL 1.0
Change-Id: Icb56be73b0d156aae8acdfa72e07f3f05c648e1e