Updated metrics logging IDrm implementation

Added scheme, generateNonce in DrmMetricsLogger

Bug: 260066511

Test: gts-tradefed run gts --abi arm64-v8a -m GtsMediaTestCases
Test: atest CtsMediaDrmFrameworkTestCases

Change-Id: Iaa5a8cbb0d38ff184f2676e0bed7d2218705bc9d
2 files changed