private boolean transferToCustomTabsProvider(File file) {
            return TrustedWebUtils.transferSplashImage(mContext, file, mAuthority, mProviderPackage,
                    mSession);
        }
Cancels the execution. The callback passed into {@link #execute} won't be called, and
the references to it will be released.
customtabs/src/android/support/customtabs/trusted/splashscreens/SplashImageTransferTask.java