fix rustup exit code issue and update CONTRIBUTING.md (#4740)

Signed-off-by: VishnuSanal <t.v.s10123@gmail.com>

CONTRIBUTING.md

@@ -39,6 +39,7 @@ If we feel your PR is a significant help to us, we'll award you a bounty with an
  - Please follow [Android/JAVA code style](https://source.android.com/docs/setup/contribute/code-style) for writing any code. Please see [this](https://github.com/TeamAmaze/AmazeFileManager/issues/986) issue too.
  - Also, follow [Android Material Design guidelines](https://m3.material.io/get-started) in case you make changes to any UI element.
  - The `file_operations` module contains native code in Rust. Please see [file_operations/src/main/rust/README.md](file_operations/src/main/rust/README.md) for more details on how to work with it.
+ - You would want to install NDK version `30.0.16248370` from Android Studio to build the project 
 
 ## PS: please make sure to
 

gradle/setupRustAndroidLocal.gradle

@@ -22,7 +22,7 @@ tasks.register("setupRustAndroidLocal") {
 
         // If not, check on user $PATH/%PATH%
         try {
-            def process = new ProcessBuilder("rustup")
+            def process = new ProcessBuilder("rustup", "--version")
                     .redirectErrorStream(true)
                     .start()
             process.waitFor()