Update BUILD

Adds a runfiles tree to the input and also runs the test with path mapping enabled.

Author: visz11

src/test/java/com/google/devtools/build/lib/remote/BUILD

@@ -149,6 +149,7 @@ java_library(
         "//src/test/java/com/google/devtools/build/lib/exec/util",
         "//src/test/java/com/google/devtools/build/lib/remote/util",
         "//src/test/java/com/google/devtools/build/lib/testutil",
+        "//src/test/java/com/google/devtools/build/lib/testutil:TestConstants",
         "//src/test/java/com/google/devtools/build/lib/testutil:TestUtils",
         "//third_party:auth",
         "//third_party:caffeine",