Add onRenderProcessGone override to webview logic, Fixes AB#3405900 (#2788)

We do not gracefully handle webview process crashes, which can cause
ANRs for calling activitties (LTW bug:
https://dev.azure.com/microsoft/OS/_workitems/edit/59756442). In this PR
we override the webview method onRenderProcessGone to handle what to do
if webview no longer is able to render content, where we send the error
to the callback rather than having an uncaught exception.


[AB#3405900](https://identitydivision.visualstudio.com/fac9d424-53d2-45c0-91b5-ef6ba7a6bf26/_workitems/edit/3405900)

---------

Co-authored-by: Copilot <[email protected]>

Author: fadidurah

common/src/main/java/com/microsoft/identity/common/internal/ui/webview/OAuth2WebViewClient.java

@@ -31,6 +31,7 @@
 import android.os.Build;
 import android.view.View;
 import android.webkit.HttpAuthHandler;
+import android.webkit.RenderProcessGoneDetail;
 import android.webkit.SslErrorHandler;
 import android.webkit.WebResourceError;
 import android.webkit.WebResourceRequest;
@@ -218,6 +219,26 @@ public void onPageFinished(final WebView view,
         view.setVisibility(View.VISIBLE);
     }
 
+    /**
+     * Handles WebView render process crashes or terminations. Previously, a WebView render process crash could cause
+     * the calling application to crash as well, because the Broker was not handling the crash and packaging it into an exception.
+     *
+     * Overriding this method allows us to gracefully handle WebView render process crashes by sending an error to the callback object
+     * when the render process is gone, preventing the application from crashing.
+     * @param view webview in question
+     * @param detail minor details about the render process being lost
+     * @return whether or not we handled the crash
+     */
+    @Override
+    @RequiresApi(api = Build.VERSION_CODES.O)
+    public boolean onRenderProcessGone(WebView view, RenderProcessGoneDetail detail) {
+        // Handle render process crash
+        // TODO: This should probably have a more specific error code, but we'll need to ask OneAuth to add new handling for it.
+        sendErrorToCallback(view, ERROR_UNKNOWN, "WebView render process gone, crashed? : " + detail.didCrash());
+
+        return true; // Indicate we handled the crash
+    }
+
     @Override
     public void onPageStarted(final WebView view,
                               final String url,