java: Overhaul detection of attestation properties

- Reuse and extend the attestation we perform for detection of functional TEE.
- Extract properties like boot hash, os version, attest version, keymaster version from the generated certificate.
- Use previous methods as fallback for devices without functional TEE.
- Set ro.boot.vbmeta.digest during initialization with the boot hash value.

Signed-off-by: Dakkshesh <beakthoven@gmail.com>

stub/src/main/java/android/os/SystemProperties.java

@@ -9,4 +9,8 @@ public class SystemProperties {
     public static String get(String key, String def) {
         throw new RuntimeException("");
     }
+
+    public static void set(String key, String val) {
+        throw new RuntimeException("");
+    }
 }