Update decision to build java-controller to Linux. (#27037)

This is because current dependencies will validate
that we use linux underneath and when compiling say esp32 on
a vscode image with JAVA_PATH set, compilation would fail.

Later on we can update/decide if java compilation should
happen on mac as well. CI only compiles and validates linux.

Co-authored-by: Andrei Litvin <andreilitvin@google.com>

build/chip/java/config.gni

@@ -16,7 +16,7 @@ java_path = getenv("JAVA_PATH")
 declare_args() {
   java_matter_controller_dependent_paths = []
   matter_enable_java_compilation = false
-  if (java_path != "" && current_os != "android") {
+  if (java_path != "" && current_os == "linux") {
     java_matter_controller_dependent_paths += [ "${java_path}/include/" ]
 
     if (current_os == "mac") {