Fix resizing when hardware renderer is off.

Dirty rect offsets and canvas offsets were incorrectly set.

Cherry picked from: b02004c5e4ecfc9b1df49200ebcaa24883c35b0e
and 223fee602408fdd62ac23f7d59406ffe7719e6be.

Test: Resize a test app with HW acceleration disabled. Confirm no
      regressions with HW enabled - eg. Gmail.
Bug: 63601140, 64402035

Change-Id: I3e1cea4dc354457b794d3cc50456a27073cb96a0