[lint] exempt Bluetooth from using non-*forUser Settings methods

Test: manual with steps in b/195968932#comment6
Test: m out/soong/.intermediates/frameworks/base/services/core/services.core.unboosted/android_common/lint/lint-report.html
BUG: 217722828
Change-Id: Iad6d780edce3a350a9676bf93fbea10b40f8b2dc