Suppress resourceshrinker stdout in soong

The resourceshrinker command prints an info log for successful runs,
which we don't really need to surface in build output. Suppress stdout
for such invocations; errors will surface through stderr.

Bug: 202959019
Test: m + compare log output
Change-Id: I08ed465bb7e3a0fa8d5e967d858f6739b5ef7fad

java/resourceshrinker.go

@@ -22,7 +22,8 @@ import (
 
 var shrinkResources = pctx.AndroidStaticRule("shrinkResources",
 	blueprint.RuleParams{
-		Command:     `${config.ResourceShrinkerCmd} --output $out --input $in --raw_resources $raw_resources`,
+		// Note that we suppress stdout to avoid successful log confirmations.
+		Command:     `${config.ResourceShrinkerCmd} --output $out --input $in --raw_resources $raw_resources >/dev/null`,
 		CommandDeps: []string{"${config.ResourceShrinkerCmd}"},
 	}, "raw_resources")