Limit btsnoop file size (5/8)

Limit btsnoop file size by rotating between snoop files. The rotation occurrs
when a fixed number of packets have been logged and will start overwriting
the older file.

Bug: 35998031
Test: Enable snoop logs from developer options and let logs get large
Merged-In: Ia8741223cb31b2c20d9ef5607e9204cc3946b165
Change-Id: Ia8741223cb31b2c20d9ef5607e9204cc3946b165