Move [generate|revoke]Challenge under ISession.aidl

Bug: 171002801
Test: m android.hardware.biometrics.fingerprint-update-api
Test: atest VtsHalBiometricsFingerprintTargetTest
Change-Id: I2aa266b7b81003b7fd0ab0328833e5500de99908
diff --git a/biometrics/fingerprint/aidl/default/Session.cpp b/biometrics/fingerprint/aidl/default/Session.cpp
index c2934a8..372066d 100644
--- a/biometrics/fingerprint/aidl/default/Session.cpp
+++ b/biometrics/fingerprint/aidl/default/Session.cpp
@@ -27,6 +27,14 @@
 
 Session::Session(std::shared_ptr<ISessionCallback> cb) : cb_(std::move(cb)) {}
 
+ndk::ScopedAStatus Session::generateChallenge(int32_t /*cookie*/, int32_t /*timeoutSec*/) {
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus Session::revokeChallenge(int32_t /*cookie*/, int64_t /*challenge*/) {
+    return ndk::ScopedAStatus::ok();
+}
+
 ndk::ScopedAStatus Session::enroll(int32_t /*cookie*/, const keymaster::HardwareAuthToken& /*hat*/,
                                    std::shared_ptr<common::ICancellationSignal>* /*return_val*/) {
     return ndk::ScopedAStatus::ok();
@@ -60,7 +68,7 @@
 }
 
 ndk::ScopedAStatus Session::invalidateAuthenticatorId(int32_t /*cookie*/,
-                                        const keymaster::HardwareAuthToken& /*hat*/) {
+                                                      const keymaster::HardwareAuthToken& /*hat*/) {
     return ndk::ScopedAStatus::ok();
 }
 
@@ -81,5 +89,4 @@
 ndk::ScopedAStatus Session::onUiReady() {
     return ndk::ScopedAStatus::ok();
 }
-
 }  // namespace aidl::android::hardware::biometrics::fingerprint