BannerMessage AttentionLevel colour-getters are public

Bug: 188757566
Test: make RunSettingsLibRoboTests

Change-Id: I01a54c32940ba1b9a17e0b9ece8f1c38089e2796
diff --git a/packages/SettingsLib/BannerMessagePreference/src/com/android/settingslib/widget/BannerMessagePreference.java b/packages/SettingsLib/BannerMessagePreference/src/com/android/settingslib/widget/BannerMessagePreference.java
index 5bedd7a1..9e39355 100644
--- a/packages/SettingsLib/BannerMessagePreference/src/com/android/settingslib/widget/BannerMessagePreference.java
+++ b/packages/SettingsLib/BannerMessagePreference/src/com/android/settingslib/widget/BannerMessagePreference.java
@@ -73,11 +73,11 @@
             throw new IllegalArgumentException();
         }
 
-        @ColorRes int getAccentColorResId() {
+        public @ColorRes int getAccentColorResId() {
             return mAccentColorResId;
         }
 
-        @ColorRes int getBackgroundColorResId() {
+        public @ColorRes int getBackgroundColorResId() {
             return mBackgroundColorResId;
         }
     }