Export Soong install rules to Make

Previously Soong's install rules have been disabled when embedded
in Make (ctx.Config().KatiEnabled() == true).  The primary blocker
for moving installation into Soong has been the `required` proeprty,
which is too vague to be easily handled in Soong.  Keeping
installation in Make has resulted in two host bin directories,
the Make-owned directory (e.g. out/host/linux-x86/bin), and the
Soong-owned directory (e.g. out/soong/host/linux-x86/bin).  The
lack of knowledge in Soong about the final, Make-owned installation
location makes it hard to support NOTICE files entirely in Soong.

This patch begins to solve this problem by supporting the creation of
the installation rules into Soong, but rather than writing the rules
to the ninja file it writes them to a Makefile and lets Kati convert
them to ninja.  This allows Kati to inject extra dependencies to
handle the `required` property.

Converting all modules to create their installation rules in Soong
would be too complex, so only modules that return true from
InstallBypassMake will use the Soong installation rules.  This
is currently only set for robolectric tests.

Bug: 204136549
Test: m checkbuild
Change-Id: I28af9fa7fadece8ea1f98f5efd140c823751cae7