Bump Android packages to newest versions, add androidsdk_5_0_1 to env

Detailed changes:
- android-sdk: update 23.0.2 -> 24.0.1
- android-platforms: add 5.0.1
- android-platform-tools: update 19 -> 21
- android-build-tools: update 20 -> 21.1.2
- android-support: update 18 -> 21
- android-support-repository: update 5 -> 9

This commit was authored by ewemoa, reviewed by me