Use proper numeric types in ext4 tool

Use proper numeric types in ext4 tool

Modify the numeric types used to represent filesystem features to solve
the problem of unnecessary casts, loss of precision and possible integer
overflow.

Simplify few related parts:
- Add template function in ProgressBar to handle different integer
  types.
- Move duplicated fast encryption logic inside copyInPlace.
- Remove unnecessary variables and calculations from
  Ext4Tool::readInfo().

Change-Id: Id4fc83390e9b26cc84fcb7e08cde6e467a6a93c4