FW: Remove ViewRoot.java - Corrects errors with Dolphin Jetpack

The ViewRoot.java file was removed from Cyanogenmod a long time ago and renamed ViewRootImpl.java, for some reason we retained this file which contained a single function declaration. This was also defined within the ViewRootImpl.java file.

Modification to ViewRootImpl.java to remove the reference to ViewRoot.java.

Change-Id: Icc6cf9f1ac834cd0d40e9e0358235f936d1614e0
Merge pull request #29 from xLaMbChOpSx/cm-10.1

FW: Remove ViewRoot.java - Corrects errors with Dolphin Jetpack