Remove the prebuilt bionic headers.

These are now generated as part of the build.

There are other changes here because it involved re-running
gen-blueprints.py, which apparently wasn't run after I purged the
deprecated NDK headers.

Test: make checkbuild
Bug: None
Change-Id: Ic86a61b53785c6cbaa3a0ba59087b0f42930c235
188 files changed