am f2519b44: Add Android.mk files for the Notepad tutorial\'s solutions

Merge commit 'f2519b444f658d2d7af8f85b0b95d12f32cf8bd2' into eclair-mr2-plus-aosp

* commit 'f2519b444f658d2d7af8f85b0b95d12f32cf8bd2':
  Add Android.mk files for the Notepad tutorial's solutions