Keystore 2.0: Remove Keystore 1.0 and remaining references

* Remove superseded keystore engine backends.
* Remove keystore_cli.
* Update keystoer_cli_v2 to use Keystore 2.0.
* Update confirmationui invocation test.
* Remove reference to enable keystore2 property from keystore2.rc.

Test: N/A
Bug: 171305684

Change-Id: I855dead9d95c2c8cfa451944087bc8290871c0e5
diff --git a/keystore2/aidl/Android.bp b/keystore2/aidl/Android.bp
index 69ba0b4..baf160d 100644
--- a/keystore2/aidl/Android.bp
+++ b/keystore2/aidl/Android.bp
@@ -68,6 +68,9 @@
         rust: {
             enabled: true,
         },
+        ndk: {
+            enabled: true,
+        }
     },
 }