Make the tools work with the new location of adb.

adb has been moved to the platform-tools folder.

This changes ADT, DDMS, HierarchyViewer which all care
where adb is (to launch it).

Also fixed the local SDK parser of the SDK Updater to find
the platform-tools package.

Change-Id: I3c869159d7b0e0ad9aaea06f376b7ba3e53bfc7f
5 files changed