tree da32c7eddf7e19fd7eedd411ac39f074be758493
parent 12cb1a8f170a1ce5db85cca10ba530bd23b88210
author davidln <davidln@google.com> 1560555747 -0700
committer David Nelloms <davidln@google.com> 1567640392 +0000

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)