Include "soong" in sandboxed out paths

Previously, the path to built files in the sandbox would be
out/.intermediates/... instead of out/soong/.intermediates/....

After this cl, it will be out/soong/.intermediates/.... This makes
it more consistent with the non-sandboxed paths, which is easier for
developers.

CtsApkVerityTestDebugFiles is a genrule that's used to find the paths
to other modules. Developers were expected to build it, then copy all
the files listed in its output file to a temporary directory. Those
paths would be wrong before this change.

Bug: 307824623
Test: ./build/soong/tests/genrule_sandbox_test.py CtsApkVerityTestDebugFiles
Change-Id: Iadf9e3240a2c828567e46b6b02cc14004f30e8bf

android/rule_builder.go

@@ -590,7 +590,7 @@ func (r *RuleBuilder) build(name string, desc string, ninjaEscapeCommandString b
 							To:   proto.String(sboxOutSubDir),
 						},
 						{
-							From: proto.String(PathForOutput(r.ctx).String()),
+							From: proto.String(r.ctx.Config().OutDir()),
 							To:   proto.String(sboxOutSubDir),
 						},
 					},
@@ -891,7 +891,7 @@ func (r *RuleBuilder) _sboxPathForInputRel(path Path) (rel string, inSandbox boo
 		// When sandboxing inputs all inputs have to be copied into the sandbox.  Input files that
 		// are outputs of other rules could be an arbitrary absolute path if OUT_DIR is set, so they
 		// will be copied to relative paths under __SBOX_OUT_DIR__/out.
-		rel, isRelOut, _ := maybeRelErr(PathForOutput(r.ctx).String(), path.String())
+		rel, isRelOut, _ := maybeRelErr(r.ctx.Config().OutDir(), path.String())
 		if isRelOut {
 			return filepath.Join(sboxOutSubDir, rel), true
 		}