Limit btsnoop file size (2/9)

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: Idf4dd2ee10d8b8aecf1066115fbb6a53ce8ea04a
Change-Id: Idf4dd2ee10d8b8aecf1066115fbb6a53ce8ea04a