libziparchive: report errors on over-long names.

Switch FindEntry and the ZipString constructor to std::string_view. This
lets us accept an over-long name so that we can reject it as too long.

Also fastboot changes to track the API change.

Bug: http://b/129068177
Test: treehugger
Change-Id: I7df7acd1fe2c46380b789c25f8909e0553e2d55e