Create benchmarks for libvibratorservice module

Adding benchmarks for vibrator::HalController, including the cached
execution of some getters.

Output on coral device:
https://paste.googleplex.com/5006149054103552

Some side fixes:

- Remove AndroidTest.xml from libpowermanager_benchmarks,
which is not required for ci and metric upload integration.

- Add missing EXTERNAL_AMPLITUDE_CONTROL capability to HIDL wrappers.

Fix: 159799891
Test: atest libvibratorservice_benchmarks
Change-Id: I193d070fad67414afd4025e747290d56203d7c56