am bb75aa90: am ca9d51b1: Disabling AccessibilityService sample from build system.

Merge commit 'bb75aa9065b1234bee8b27681810d563e31d955b' into gingerbread-plus-aosp

* commit 'bb75aa9065b1234bee8b27681810d563e31d955b':
  Disabling AccessibilityService sample from build system.