Update ddmlib and tradefed prebuilt for CTS failure

DO NOT MERGE

Bug: 11544667
Change-Id: I552e6d5377e9ffa1d9c477be3eeaa9911949f71e
merge in release branch changes (no-op).
add unbundled uiautomator as prebuilt

From the revision 4f1de5ca867a72b8f69bfb878ce220ae0ce4b00c

Prebuilt jar obtained from uiautomator@1074674

Change-Id: I878670f430bd8a38b6e0021216d98b8e405e0fb0
Merge remote-tracking branch 'aosp/kitkat-mr2-release' into kitkat