Port LCD Wizard dpi changer

This port contains all the 3 commits from SlimRoms
156b17a7397afd8ef98d40fef0f90c7cc5babbce
89856168c2ef88ba07f731139cddcf43506cffcd
192931af03a34d5e3d6a9741c5553e1b9880d1e9

Change-Id: I36a603a80f970a6f7c9bb64c281d51adab2fc6c0