Restore the ability to build RS-related binaries on Windows.

Bug: 14416410

This change reverts two prior commits (listed below):

Revert "Use renderscript prebuilts for windows."
This reverts commit ebacf02e88f7ec2bf77b671d14e1d524a2786e1b.

Revert "Temporarily disable rs/bcc in win_sdk"
This reverts commit c63c2d31ba050d61594aaa317b6d32f5627ce6fc.
2 files changed