Both the CMake and Android build targets are removed. This change leaves
the actual code in place for now, to have smaller revert in case we need
OpenGL ES 1.1 a little longer.

Bug: b/147516027
Change-Id: I0ac044e61a601e43fbd7f727db2bfe7e9a4cabb3
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/53908
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>