[Android] Add JniType for IdentityManager

Chromium change:
https://chromium.googlesource.com/chromium/src/+/bc4938e69e604e0029b414bf1e247099272efe50

[Signin][Android] Add JniType for IdentityManager

Adds support for JniType annotations for IdentityManager and migrates
some of the JNI methods that are using this class. Also, leverages the
existing JniType annotations for Profile to simplify
IdentityServicesProvider.

Bug: 348373729

android/java/org/chromium/chrome/browser/signin/BraveSigninManager.java

@@ -11,6 +11,7 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
 import org.jni_zero.CalledByNative;
+import org.jni_zero.JniType;
 
 import org.chromium.base.Callback;
 import org.chromium.chrome.browser.profiles.Profile;
@@ -96,8 +97,8 @@ public class BraveSigninManager implements SigninManager {
     @CalledByNative
     static SigninManager create(
             long nativeSigninManagerAndroid,
-            Profile profile,
-            IdentityManager identityManager,
+            @JniType("Profile*") Profile profile,
+            @JniType("signin::IdentityManager*") IdentityManager identityManager,
             IdentityMutator identityMutator,
             SyncService syncService) {
         AccountInfoServiceProvider.init(identityManager);

chromium_src/chrome/browser/signin/android/signin_manager_android.cc

@@ -7,6 +7,9 @@
 
 #include "base/android/callback_android.h"
 #include "base/android/jni_string.h"
+#include "components/signin/public/identity_manager/identity_manager.h"
+
+// Must come after all headers that specialize FromJniType() / ToJniType().
 #include "brave/build/android/jni_headers/BraveSigninManager_jni.h"
 #include "chrome/android/chrome_jni_headers/SigninManagerImpl_jni.h"