Revert all commits related with root-minimization.

Revert all commits related with root-minimization.

This is a combination of following 6 commits :
Revert "Change the touch file path /tmp to /run"
Revert "Add ecryptfs key linking in the keyring of root user"
Revert "Change ode daemon as non-root"
Revert "Add systemd unit for external storage mount with smackfs* option"
Revert "Revert "Add smackfsroot, smackfsdef in mount options of ecryptfs""
Revert "Change service to on-demand by Systemd socket activation"

Change-Id: If4482b14237715d0f19c45b0ca5573c6ac7b8484