This change makes the installation routine for rust be similar to that
of cc. Previously, rust.baseCompiler.install() (which internally calls
android.ModuleContext.InstallFile()) was not called when the module is
not installable. Although this may sound right at first glance, it is a
behavior different from that of cc and prevents an uninstallable rust
module from being packaged into a packaging module like
android_filesystem. This is because the packaging happens inside
InstallFile().
Fixing the issue by following the behavior of cc modules; Call
HideFromMake() or SkipInstall() when a rust module is not installable,
but call InstallFile() as long as the output file is valid.
InstallFile() internally skips the installation (but the packaging) when
HideFromMake() or SkipInstall() was called.
Bug: N/A
Test: atest MicrodroidHostTestCases
Change-Id: I15f4adc8544dac53647647d8bc4273f9f4acbeb2
d1e366a072