[Large screen] Make slice deep linking to Settings show in 2-pane

- add a standalone home activity for slice deep link.
- add EXTRA_IS_FROM_SLICE to control the slice deep link flow.
- Intent#parseUri fails if the intent data schema is set.
  Add EXTRA_SETTINGS_LARGE_SCREEN_DEEP_LINK_INTENT_DATA to relay the
  data schema.

Bug: 201397123
Test: manual, robotest
      1.  Say 'Enable NFC'/'Enable Bluetooth'to Google assistant.
      2.  Click the the NFC/BT Slice.
Change-Id: Ia3216956328c32b2109cb2d70ad1105327661f26

src/com/android/settings/slices/SliceBuilderUtils.java

@@ -16,6 +16,7 @@
 
 package com.android.settings.slices;
 
+import static com.android.settings.SettingsActivity.EXTRA_IS_FROM_SLICE;
 import static com.android.settings.core.BasePreferenceController.DISABLED_DEPENDENT_SETTING;
 import static com.android.settings.slices.SettingsSliceProvider.EXTRA_SLICE_KEY;
 
@@ -211,7 +212,9 @@ public class SliceBuilderUtils {
                 .setTitleText(screenTitle)
                 .setSourceMetricsCategory(sourceMetricsCategory)
                 .toIntent();
-        searchDestination.putExtra(SettingsActivity.EXTRA_FRAGMENT_ARG_KEY, key)
+        searchDestination
+                .putExtra(SettingsActivity.EXTRA_FRAGMENT_ARG_KEY, key)
+                .putExtra(EXTRA_IS_FROM_SLICE, true)
                 .setAction("com.android.settings.SEARCH_RESULT_TRAMPOLINE")
                 .setComponent(null);
         searchDestination.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);