Change the parameter type of offset in read

As we support zip64 in libziparchive, we change the parameter of
the ReadAtOffset() in zip reader from uin32_t to off64_t. So the
derived class needs to be updated as well.

Bug: 150900468
Test: build
Change-Id: Icbfd2dd54b01ff62da988ba8598c1057f9bb6368
1 file changed