Declare support for v4 of KeyMint HAL

Bug: 377744414
Bug: 369375199
Test: vts_treble_vintf_vendor_test
Change-Id: I1fc04834819cc9291d89a6ee6803cbc5d5d91437
diff --git a/trusty/keymint/android.hardware.security.keymint-service.rust.trusty.xml b/trusty/keymint/android.hardware.security.keymint-service.rust.trusty.xml
index 3dc9c88..f74d212 100644
--- a/trusty/keymint/android.hardware.security.keymint-service.rust.trusty.xml
+++ b/trusty/keymint/android.hardware.security.keymint-service.rust.trusty.xml
@@ -1,7 +1,7 @@
 <manifest version="1.0" type="device">
     <hal format="aidl">
         <name>android.hardware.security.keymint</name>
-        <version>3</version>
+        <version>4</version>
         <fqname>IKeyMintDevice/default</fqname>
     </hal>
     <hal format="aidl">