Align with metadata API changes

- Fix typo on custom metadata keys.
- Upgrade Bluetooth database version to 102 and change
  custom metadata data type from string to byte array.

Bug: 124448651
Test: build pass, runtest bluetooth
Change-Id: Ic3946ac8890a90d4a65e8a333d6a3c93b3bfcf7c
Merged-In: Ic3946ac8890a90d4a65e8a333d6a3c93b3bfcf7c