Add a HIDL-based keystore_get variant

Create a "keystore_get" library that uses the HIDL path insted
of using binder directly.

Bug: 34603782
Test: Able to connect to wifi passpoint networks.
Change-Id: I0f545ea104e3f27bebd262bc5a2e79f6b517c972
diff --git a/keystore-engine/keystore_backend_binder.cpp b/keystore-engine/keystore_backend_binder.cpp
index 181bd65..dce8242 100644
--- a/keystore-engine/keystore_backend_binder.cpp
+++ b/keystore-engine/keystore_backend_binder.cpp
@@ -54,7 +54,7 @@
         return -1;
     }
 
-    *reply = reply_vec.data();
+    *reply = reply_vec.releaseData();
     *reply_len = reply_vec.size();
     return 0;
 }
@@ -76,7 +76,7 @@
         return -1;
     }
 
-    *pubkey = pubkey_vec.data();
+    *pubkey = pubkey_vec.releaseData();
     *pubkey_len = pubkey_vec.size();
     return 0;
 }