Revert "Few NavBar fixes"

This reverts commit 4f7c4f61fab7edcc07734c74724a68d3887d283f.
Revert "Some NavBar improvements"

This reverts commit 94d7b9dd5111d03a53e4fda3b95e7d2a3fd25ed9.
Revert "Navigation bar height/width (1/2)"

This reverts commit c188a621c6fb81f9742c3ba82c146ce2545d917e.

Conflicts:
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

Change-Id: I7671958d053fbc4d6e2216aaa7805f464e240f6e