Test for patchlevels and too much entropy

Add tests for:
 - Too much entropy should be rejected with INVALID_INPUT_LENGTH
 - All authorization lists should include a vendor and boot patchlevel.

These requirements are in both the KeyMint and the KeyMaster 4.0 AIDL
specificications, but have never been policed before.

Currently disabled with a command-line flag because CF does not have
the patchlevels and so fails lots of tests.

Test: VtsKeyMintAidlTargetTest
Change-Id: Ic9622ef3f1b80e013a34059218e3e029f392eb72
diff --git a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.cpp b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.cpp
index 80bd057..f0dfff1 100644
--- a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.cpp
+++ b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.cpp
@@ -170,6 +170,7 @@
 
     os_version_ = getOsVersion();
     os_patch_level_ = getOsPatchlevel();
+    vendor_patch_level_ = getVendorPatchlevel();
 }
 
 void KeyMintAidlTestBase::SetUp() {