Do not return an error if the dalvik-cache odex is missing

Test: adb shell /data/nativetest/installd_service_test/installd_service_test
      Tried uninstalling an updated version of prebuilt app.
      Didn't find the error message in the logcat.
Bug: 35804241
Change-Id: Iec045fa9c9ac8f036785fe5cbd0f7e43f2b680c1