Revert "[1/2] Base: Upgrade network traffic meter"

This reverts commit 981dcd7a22e1c83b94bba18c0e93a8d51979933c.
Revert "[1/2] SystemUI: Update network traffic indicator"

This reverts commit 775c7f2fd9cb51c0f1c5b412c80d87d6afa51c2c.
Revert "[1/2] SystemUI: Network speed indicator"

This reverts commit b6fc18c2468d9685a3e560503b32583e9d2b4e55.