ConfirmationUI reference implementation

This reference implementation implements the core
logic of the confirmation provider including the
cryptographic operations. For a full implementation
a user interface and a few policy checks are missing.

Bug: 63928580
Test: VtsHalConfirmationUIV1_0TargetTest
Change-Id: I22ca138ed612979223f8e83792b525a31709e0fe
diff --git a/confirmationui/1.0/default/OWNERS b/confirmationui/1.0/default/OWNERS
new file mode 100644
index 0000000..335660d
--- /dev/null
+++ b/confirmationui/1.0/default/OWNERS
@@ -0,0 +1,2 @@
+jdanis@google.com
+swillden@google.com