Backport: Update the documentation of ANDROID_RESOLV_NO_CACHE_STORE am: 9ebf233e8d am: 53a896dcf9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/12097328

Change-Id: If7b9dc17e41634b1a110946fb96447c41977ac30