Adapt to google::protobuf::uint64 type change

Protobuf 3.5.2 redefines google::protobuf::uint64 from unsigned long
long to uint64_t, which is sometimes unsigned long and sometimes
unsigned long long.  Use PRIu64 to print it.

Bug: 117607748
Test: m checkbuild
Change-Id: Ifdbc33cdafca5b82a1ffbcbfa4e292a819deb244
2 files changed