manifest: remove platform/packages/apps/OMA-DM package

is not present in aosp manifest and was not updated to new tag

Change-Id: I4ed3c0cafc00f2f15042c2ba62900816ce362733
manifest: update to new aosp release + tracking other packages

Change-Id: I355e6bdf9f72d316fb7cfca22d4db7799ab2c7fd
manifest: track ContactsProvider again + add linaro toolchain

Change-Id: I5c8d12511e62ebdd4fa1e3a8bf6769e5b0871c66