Revert "Remove unused callback and handler for isUVPAA"

This reverts commit 05e16b52.

Reason for revert: Clank should use the GmsCore implementation of isUVPAA, see crbug.com/1017587

Original change's description:
> Remove unused callback and handler for isUVPAA
>
> This CL aims at removing rest of the code to use gmscore isUVPAA.
>
> This CL is the third of 3 CLs to add isUVPAA implemenration on clank
> and remove the flow to call isUVPAA that gmscore supports.
> First CL:
> https://chromium-review.googlesource.com/c/chromium/src/+/1739973
> Second CL:
> https://chrome-internal-review.googlesource.com/c/clank/internal/apps/+/1587528
>
> Bug: n/a
> Change-Id: I8f045738e3b3213184e7109bb42f1924ad8c55b0
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1750406
> Commit-Queue: Suzy Li <suzyli@google.com>
> Reviewed-by: Ken Buchanan <kenrb@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#686483}

TBR=kenrb@chromium.org,suzyli@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 1017587
Change-Id: Ieb9e7b9c18a9f36775fdf4b579637a34e55a4959
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1880127Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Commit-Queue: Suzy Li <suzyli@google.com>
Cr-Commit-Position: refs/heads/master@{#709258}

chrome/android/java/src/org/chromium/chrome/browser/webauth/AuthenticatorImpl.java

@@ -40,6 +40,8 @@ public class AuthenticatorImpl extends HandlerResponseCallback implements Authen
             .Callback2<Integer, MakeCredentialAuthenticatorResponse> mMakeCredentialCallback;
     private org.chromium.mojo.bindings.Callbacks
             .Callback2<Integer, GetAssertionAuthenticatorResponse> mGetAssertionCallback;
+    private org.chromium.mojo.bindings.Callbacks
+            .Callback1<Boolean> mIsUserVerifyingPlatformAuthenticatorAvailableCallback;
 
     /**
      * Builds the Authenticator service implementation.

chrome/android/java/src/org/chromium/chrome/browser/webauth/Fido2ApiHandler.java

@@ -50,4 +50,7 @@ public class Fido2ApiHandler {
 
     protected void getAssertion(PublicKeyCredentialRequestOptions options,
             RenderFrameHost frameHost, HandlerResponseCallback callback) {}
+
+    protected void isUserVerifyingPlatformAuthenticatorAvailable(
+            RenderFrameHost frameHost, HandlerResponseCallback callback) {}
 }

chrome/android/java/src/org/chromium/chrome/browser/webauth/HandlerResponseCallback.java

@@ -23,6 +23,12 @@ public class HandlerResponseCallback {
      */
     public void onSignResponse(Integer status, GetAssertionAuthenticatorResponse response){};
 
+    /**
+     * Callback for handling response from a request to call
+     * isUserVerifyingPlatformAuthenticatorAvailable.
+     */
+    public void onIsUserVerifyingPlatformAuthenticatorAvailableResponse(boolean isUVPAA){};
+
     /**
      * Callback for handling any errors from either register or sign requests.
      */