am bca9f1bb: sdk doc change for esr: updates for android 1.6 r2, tools r4, api levels.

Merge commit 'bca9f1bbb31cf05ba17af049a5ea37f57981f00e' into eclair-mr2

* commit 'bca9f1bbb31cf05ba17af049a5ea37f57981f00e':
  sdk doc change for esr: updates for android 1.6 r2, tools r4, api levels.