Disable newapi check in defaults

- Making newapi disabled by default will ensure that this lint check
  does not run on the platform. This prevents noisy lint warnings like b/228956345#1
- This lint check will continue to be enforced on the transitive deps of
  apexes, since lint.strict_updatability_linting will be true for those
  Soong modules

Test: TH
Test: m
out/soong/.intermediates/frameworks/base/services/core/services.core.unboosted/android_common/lint/lint-report.xml
// file no longer contains "Call requires API level ..." warning
Bug: 228956345

Change-Id: I8ef3137394011fb679a1129f80f6351fb05a4eff