Add change note

Author: atorralba

java/ql/lib/change-notes/2022-08-23-contentresolver-summaries.md

@@ -0,0 +1,10 @@
+---
+category: minorAnalysis
+---
+* Added new flow steps for the following Android classes:
+  * `android.content.ContentResolver`
+  * `android.content.ContentProviderClient`
+  * `android.content.ContentProviderOperation`
+  * `android.content.ContentProviderOperation$Builder`
+  * `android.content.ContentProviderResult`
+  * `android.database.Cursor`