Turn the "sandbox" directory into a package.

RELNOTES: None.
PiperOrigin-RevId: 277590911

src/main/java/com/google/devtools/build/lib/sandbox/BUILD

diff --git a/src/main/java/com/google/devtools/build/lib/sandbox/BUILD b/src/main/java/com/google/devtools/build/lib/sandbox/BUILD
index 7e398e2..b9f9722 100644
--- a/src/main/java/com/google/devtools/build/lib/sandbox/BUILD
+++ b/src/main/java/com/google/devtools/build/lib/sandbox/BUILD
@@ -5,10 +5,6 @@
 filegroup(
     name = "srcs",
     srcs = glob(["**"]),
-    visibility = [
-        "//src/main/java/com/google/devtools/build/lib:__pkg__",
-        "//src/test/shell/bazel:__pkg__",
-    ],
 )
 
 java_library(
@@ -22,7 +18,7 @@
         "//src/main/java/com/google/devtools/build/lib:command-utils",
         "//src/main/java/com/google/devtools/build/lib:events",
         "//src/main/java/com/google/devtools/build/lib:io",
-        "//src/main/java/com/google/devtools/build/lib:out-err",
+        "//src/main/java/com/google/devtools/build/lib:os_util",
         "//src/main/java/com/google/devtools/build/lib:process_util",
         "//src/main/java/com/google/devtools/build/lib:resource-converter",
         "//src/main/java/com/google/devtools/build/lib:runtime",
@@ -37,12 +33,13 @@
         "//src/main/java/com/google/devtools/build/lib/shell",
         "//src/main/java/com/google/devtools/build/lib/versioning",
         "//src/main/java/com/google/devtools/build/lib/vfs",
+        "//src/main/java/com/google/devtools/build/lib/vfs:pathfragment",
         "//src/main/java/com/google/devtools/common/options",
         "//third_party:auto_value",
-        "//third_party:gson",
         "//third_party:guava",
         "//third_party:jsr305",
-        "//third_party/protobuf:protobuf_java",
         "@remoteapis//:build_bazel_remote_execution_v2_remote_execution_java_proto",
+        "//third_party:gson",
+        "//third_party/protobuf:protobuf_java",
     ],
 )