Move all contextual card related classes.

... from homepage to contextualcards.

Test: rebuild
Change-Id: Id7889566ce1e7257eb699d963ae996906fdb58ff
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 6b9c637..3bd5193 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -3108,7 +3108,7 @@
                  android:permission="android.permission.BIND_JOB_SERVICE" />
 
         <provider
-            android:name=".homepage.CardContentProvider"
+            android:name=".homepage.contextualcards.CardContentProvider"
             android:authorities="com.android.settings.homepage.CardContentProvider"
             android:exported="true"
             android:permission="android.permission.WRITE_SETTINGS_HOMEPAGE_DATA" />