Revert "Move PacketReader and FdEventReader"

Revert "Move static utils to a module package"

Revert "Move static utils to a module package"

Revert submission 12698912-move_packetreader

Reason for revert: Broke presubmit on git_master, b/169861635
Reverted Changes:
If5d1e4a58:Move module utils to the module package.
I44ffaad3d:Move PacketReader and FdEventReader
I93e9cfd96:Move util classes to their destination package
Ia84d64130:Move static utils to a module package
Iaac2810c7:Move static utils to a module package

Change-Id: I2b715c5511dae78c30b64e6a3f3eef525b6ec40a