Move platform constraints to bazel_common_rules.

This enables sharing of platform constraints between platform and kernel builds.

Bug: 304594734

Test: treehugger
Change-Id: I48091eeaf2e529c3f180ba056da3935911868b14
diff --git a/bp2build/java_import_conversion_test.go b/bp2build/java_import_conversion_test.go
index d9910af..bba2f50 100644
--- a/bp2build/java_import_conversion_test.go
+++ b/bp2build/java_import_conversion_test.go
@@ -88,8 +88,8 @@
 		ExpectedBazelTargets: []string{
 			MakeBazelTarget("java_import", "example_import", AttrNameToString{
 				"jars": `select({
-        "//build/bazel/platforms/os:android": ["android.jar"],
-        "//build/bazel/platforms/os:linux_glibc": ["linux.jar"],
+        "//build/bazel_common_rules/platforms/os:android": ["android.jar"],
+        "//build/bazel_common_rules/platforms/os:linux_glibc": ["linux.jar"],
         "//conditions:default": [],
     })`,
 			}),