Add script to freeze framework manifest. am: 653a8453f0 am: 7c764670c3 am: 07d09dcf43 am: bf52935fd6

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/1461487

Change-Id: Ia12a5a92abbfd2b3773f9280eb7a8748f6daa6e5