Add CredentialStorage with clear option.

CertInstaller relies on Settings to install keys into the system KeyStore.

Bug: 130199964
Bug: 139705828

Test: CtsVerifier KeyChainTest, ensure certificates can be installed,
  clear credentials, RunCarSettingsRoboTests
Change-Id: I88384012fa401f5cbdda8f780ff65327bf0694a7
Merged-In: I88384012fa401f5cbdda8f780ff65327bf0694a7
(cherry picked from commit 64ad8cd298572cc9f0180379ff455580be9434e8)
9 files changed
tree: da32c7eddf7e19fd7eedd411ac39f074be758493
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. PREUPLOAD.cfg