Fix project dependencies.

- MyTrack app should export google-common.jar, common-logging-1.1.1.jar,
  protobuf-java-2.3.0-lite.jar and the MyTracksLib library.
- A test should only depend on its app. E.g., it should not need to
  reference the MyTracksLib library again.

SignalStrengthSampler/project.properties

@@ -7,7 +7,7 @@
 # "ant.properties", and override values to adapt the script to your
 # project structure.
 
-android.library.reference.1=../MyTracksLib/
 proguard.config=proguard.cfg
 # Project target.
 target=android-14
+android.library.reference.1=../MyTracksLib