[Screenshots] Avoid crash requesting permissions after fragment saved and unloaded

Note: Based on a few historical bugs that address a similar issue. Could not repro
on my personal test device, will coordinate verification with reporter.

Bug: 1145497
Change-Id: I3d1f9781037fad41cb1f7af578781eed9b7c1ec3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2529971Reviewed-by: Jeffrey Cohen <jeffreycohen@chromium.org>
Commit-Queue: Travis Skare <skare@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826349}

chrome/browser/share/android/java/src/org/chromium/chrome/browser/share/screenshot/ScreenshotShareSheetDialog.java

@@ -63,7 +63,7 @@ public class ScreenshotShareSheetDialog extends DialogFragment {
                         R.layout.screenshot_share_sheet, null);
         builder.setView(screenshotShareSheetView);
 
-        new ScreenshotShareSheetCoordinator(mContext, mScreenshot, this::dismiss,
+        new ScreenshotShareSheetCoordinator(mContext, mScreenshot, this::dismissAllowingStateLoss,
                 screenshotShareSheetView, mTab, mChromeOptionShareCallback, mInstallCallback);
         return builder.create();
     }