Updates to OTA Keybox Reprovisioning

Adjust OTA code to account for some design changes and
add integration tests.

Merge from Widevine repo of http://go/wvgerrit/133775
Change use_test_key to uint32_t type

Merge from Widevine repo of http://go/wvgerrit/133774
Cleanup CDM OKP info before tests.

Merge from Widevine repo of http://go/wvgerrit/133773
Change context for derivation in OTA keybox solution

Merge from Widevine repo of http://go/wvgerrit/133772
Updated OTA keybox key derivation.

Merge from Widevine repo of http://go/wvgerrit/133771
Use double provisioning step in integration tests

Merge from Widevine repo of http://go/wvgerrit/133770
Erase keybox on initialization for OEMCrypto testbed

Merge from Widevine repo of http://go/wvgerrit/133769
Add session id to OEMCrypto OTA functions

Merge from Widevine repo of http://go/wvgerrit/133768
Integration test for OTA Keybox reprovisioning

Merge from Widevine repo of http://go/wvgerrit/133767
Add test x509 cert for testing

Merge from Widevine repo of http://go/wvgerrit/133766
OTA Keybox basic functionality in testbed

Merge from Widevine repo of http://go/wvgerrit/133765
Update OTA test script to use newer build scripts

Merge from Widevine repo of http://go/wvgerrit/133764
Adjust comment stype for doxygen

Test: Test: unit/integration/GtsMediaTestCases

Bug: 190505461
Bug: 190505461
Bug: 190505461
bug: 187646550
Bug: 187646550
Bug: 187646550
Bug: 187646550
Bug: 190505461
Bug: 187646550
Bug: 188228998
Bug: 190505461
Bug: 187646550
Merged-In: I41ff819a1fd8aca2e20adb25127fa0d9c4879b01
Change-Id: I41ff819a1fd8aca2e20adb25127fa0d9c4879b01

libwvdrmengine/build_all_unit_tests.sh

@@ -48,6 +48,7 @@ WV_TEST_TARGETS="base64_test \
      hidl_metrics_adapter_unittest \
      http_socket_test \
      initialization_data_unittest \
+     keybox_ota_test \
      libwvdrmdrmplugin_hidl_test \
      libwvdrmdrmplugin_test \
      libwvdrmengine_hidl_test \
@@ -59,6 +60,8 @@ WV_TEST_TARGETS="base64_test \
      metrics_collections_unittest \
      oemcrypto_test \
      odk_test \
+     okp_fallback_policy_test \
+     ota_keybox_provisioner_test \
      policy_engine_constraints_unittest \
      policy_engine_unittest \
      policy_integration_test \