[Wi-Fi] Add a new proto field for adding new networks panel page.

Add a new metric for proto upload log use.

For R feature: Add a mechanism for apps to add saved networks to the
device, need to define a new metric for this page.

Bug: 144891278
Test: will test in the Settings APP CL
Change-Id: I819ba0b39401576ab04e8f9adb9b7196a61fc6f6