power: Make HintManager a singleton class

HintManager is unique and widely used in many different components.
This is for making it easiler to be reloaded for debugging.

Bug: 172285365
Test: adb push \
      out/target/product/raven/data/nativetest64/libperfmgr_test/libperfmgr_test \
      /data/nativetest64/libperfmgr_test/libperfmgr_test && \
      adb shell /data/nativetest64/libperfmgr_test/libperfmgr_test
Change-Id: I3affdfe780073ebbc50fac7bfbdd1530ee9dc8c2
9 files changed
tree: b83857bd5ac72cd2ed65cf3b908a8d883ae6f386
  1. aidl/
  2. alsa_utils_legacy/
  3. BesLoudness/
  4. hidl/
  5. interfaces/
  6. libmtkperf_client/
  7. Android.bp
  8. Android.mk
  9. README.md
README.md

Common hardware components for MediaTek devices