Migrate keystore2's Rust system library bindings to bionic.

This is purely a port: it does not add or change any functionality
(other than renaming the library).

Bug: 182498247
Test: Use library.
Change-Id: Ice0c07d5afcbdd2029775fd61eb04a6f7058fdcf
diff --git a/keystore2/src/super_key.rs b/keystore2/src/super_key.rs
index e02d9bc..fbb0360 100644
--- a/keystore2/src/super_key.rs
+++ b/keystore2/src/super_key.rs
@@ -46,13 +46,13 @@
     aes_gcm_decrypt, aes_gcm_encrypt, generate_aes256_key, generate_salt, Password, ZVec,
     AES_256_KEY_LENGTH,
 };
-use keystore2_system_property::PropertyWatcher;
 use std::{
     collections::HashMap,
     sync::Arc,
     sync::{Mutex, Weak},
 };
 use std::{convert::TryFrom, ops::Deref};
+use system_properties::PropertyWatcher;
 
 const MAX_MAX_BOOT_LEVEL: usize = 1_000_000_000;
 /// Allow up to 15 seconds between the user unlocking using a biometric, and the auth