keystore2: cope with KeyMint AIDL V2

Bug: 194358913
Test: TreeHugger
Change-Id: Ibc2d96f2cd4fd2edde4c69cf862580412af08dd7
diff --git a/keystore2/src/raw_device.rs b/keystore2/src/raw_device.rs
index 991535f..0ee3db0 100644
--- a/keystore2/src/raw_device.rs
+++ b/keystore2/src/raw_device.rs
@@ -59,6 +59,8 @@
     pub const KEY_MASTER_V4_1: i32 = 41;
     /// Version number of KeyMintDevice@V1
     pub const KEY_MINT_V1: i32 = 100;
+    /// Version number of KeyMintDevice@V2
+    pub const KEY_MINT_V2: i32 = 200;
 
     /// Get a [`KeyMintDevice`] for the given [`SecurityLevel`]
     pub fn get(security_level: SecurityLevel) -> Result<KeyMintDevice> {