Move dex utilities from dalvik/dx to libcore/dex

Change-Id: If0022a069ba3ac51ae5cdc4b0eabb6b913cd8afe
(cherry picked from commit 7b13a4d41243f81fe80a76e2ff2f877b53610446)

Conflicts:
	dx/src/com/android/dex/Code.java
	dx/src/com/android/dex/Dex.java
	dx/src/com/android/dex/SizeOf.java
	dx/src/com/android/dex/TableOfContents.java
26 files changed