Fix R in Spa slice provider Demo

import android.app.PendingIntent

import android.content.Context

import android.net.Uri

import androidx.core.R

import androidx.core.graphics.drawable.IconCompat

import androidx.slice.Slice

import androidx.slice.SliceManager

import androidx.slice.builders.ListBuilder

import androidx.slice.builders.SliceAction

import androidx.slice.core.R

import com.android.settingslib.spa.framework.common.SpaEnvironmentFactory

import com.android.settingslib.spa.slice.createBroadcastPendingIntent

import com.android.settingslib.spa.slice.createBrowsePendingIntent