Exclude network types from usage data

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A mobile operator may wish to exclude specific network types from the total data usage calculated by a device. For example, network traffic over an MMS APN may be “zero-rated” by a mobile operator. To support this, the set of network types used to calculate total data usage can be configured through the config_data_usage_network_types resource at build time.

Some mobile radio implementations may have unique Linux network interfaces for each active APN, while other radios may force multiple APNs to coexist on a single interface. Android can collect network statistics from both designs, but config_data_usage_network_types is not be effective at excluding APNs forced to coexist on a single interface.