Deprecate Snapshot build

Existing snapshot code will no longer work from VNDK deprecation, but it
can give confusion to users if we keep code for the snapshot - and it
adds complexity on existing code while it is not in use. This change
removes all snapshot definition except host snapshot and its usage.

Bug: 330100430
Bug: 332986564
Test: AOSP CF build succeeded
Change-Id: Ieb6fa43d5e38315c662ce997bc305b744b367c24

sh/sh_binary.go

@@ -20,12 +20,12 @@ import (
 	"strings"
 
 	"android/soong/testing"
+
 	"github.com/google/blueprint"
 	"github.com/google/blueprint/proptools"
 
 	"android/soong/android"
 	"android/soong/cc"
-	"android/soong/snapshot"
 	"android/soong/tradefed"
 )
 
@@ -535,5 +535,3 @@ func ShTestHostFactory() android.Module {
 }
 
 var Bool = proptools.Bool
-
-var _ snapshot.RelativeInstallPath = (*ShBinary)(nil)