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/fdo_profile_conversion_test.go b/bp2build/fdo_profile_conversion_test.go
index 4d04283..918b27c 100644
--- a/bp2build/fdo_profile_conversion_test.go
+++ b/bp2build/fdo_profile_conversion_test.go
@@ -50,8 +50,8 @@
 }`,
 			expectedBazelAttrs: AttrNameToString{
 				"profile": `select({
-        "//build/bazel/platforms/arch:arm": "foo_arm.afdo",
-        "//build/bazel/platforms/arch:arm64": "foo_arm64.afdo",
+        "//build/bazel_common_rules/platforms/arch:arm": "foo_arm.afdo",
+        "//build/bazel_common_rules/platforms/arch:arm64": "foo_arm64.afdo",
         "//conditions:default": None,
     })`,
 			},