Add Wifi Slice

Add a custom Wifi Slice to the Settings Slice Provider.
It needs a custom Slice because of the complicated listener logic
in the MasterSwitchPreferenceController, which makes it hard to
work-in synchronous set/get logic.

The one-off Slice requires extra changes, including:
- Including it in getDescendants
- Handling changes to wifi by the framework

This is the first change that uses SettingsLib's broadcast relay,
which allows settings to (un)register IntentFilters to a Uri,
allowing Settings Slices affected by the framework (quicksettings,
connectivity related, volume, etc) to be updated without action
on the Slice.

Fixes: 70622039
Fixes: 67997332
Test: robotests
Change-Id: Ia76738dd6baacd5522d52df2c61ebad86a600282
Merged-In: Ibfe4736beecb833e3f6bb871b2eb5228a5fd3a34

tests/robotests/src/com/android/settings/testutils/SliceTester.java

@@ -35,6 +35,7 @@ import java.util.Arrays;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.stream.Collectors;
 
 import androidx.slice.Slice;
 import androidx.slice.SliceItem;
@@ -211,7 +212,7 @@ public class SliceTester {
         assertKeywords(metadata, sliceData);
     }
 
-    private static void assertTitle(List<SliceItem> sliceItems, String title) {
+    public static void assertTitle(List<SliceItem> sliceItems, String title) {
         boolean hasTitle = false;
         for (SliceItem item : sliceItems) {
             List<SliceItem> titleItems = SliceQuery.findAll(item, FORMAT_TEXT, HINT_TITLE,
@@ -230,8 +231,9 @@ public class SliceTester {
 
     private static void assertKeywords(SliceMetadata metadata, SliceData data) {
         final List<String> keywords = metadata.getSliceKeywords();
-        final Set<String> expectedKeywords = new HashSet<>(
-                Arrays.asList(data.getKeywords().split(",")));
+        final Set<String> expectedKeywords = Arrays.stream(data.getKeywords().split(","))
+                .map(s -> s = s.trim())
+                .collect(Collectors.toSet());
         expectedKeywords.add(data.getTitle());
         expectedKeywords.add(data.getScreenTitle().toString());
         assertThat(keywords).containsExactlyElementsIn(expectedKeywords);