Merge "Fallback to default on null dialer"

import androidx.annotation.NonNull;

import androidx.annotation.Nullable;

import java.util.List;

/**

 * Class for behavior of the dialer role.

 *

                context);

    }

    @NonNull

    @Nullable

    @Override

    public List<String> getDefaultHolders(@NonNull Role role, @NonNull Context context) {

        return ExclusiveDefaultHolderMixin.getDefaultHolders(role, "config_defaultDialer", context);

    public String getFallbackHolder(@NonNull Role role, @NonNull Context context) {

        return ExclusiveDefaultHolderMixin.getDefaultHolder(role, "config_defaultDialer", context);

    }

}

    /**

     * Get the fallback holder of this role, which will be added whenever there are no role holders.

     * <p>

     * Should return empty if this role {@link #mShowNone shows a "None" item}.

     * Should return {@code null} if this role {@link #mShowNone shows a "None" item}.

     *

     * @param context the {@code Context} to retrieve system services

     *