test: add NDK enabled tests for CrashReporting API

- Implemented unit tests for `setNDKEnabled` method in both Java and Dart.
- Verified that enabling and disabling NDK crash reporting calls the appropriate host methods.

Author: MoKamall

android/src/test/java/com/instabug/flutter/CrashReportingApiTest.java

@@ -98,4 +98,22 @@ public void testSendNonFatalError() {
 
         reflected.verify(() -> MockReflected.crashReportException(any(JSONObject.class), eq(isHandled), eq(expectedUserAttributes), eq(expectedFingerprint), eq(expectedLevel)));
     }
+
+    @Test
+    public void testSetNDKEnabledGivenTrue() {
+        boolean isEnabled = true;
+
+        api.setNDKEnabled(isEnabled);
+
+        mCrashReporting.verify(() -> CrashReporting.setNDKCrashesState(Feature.State.ENABLED));
+    }
+
+    @Test
+    public void testSetNDKEnabledGivenFalse() {
+        boolean isEnabled = false;
+
+        api.setNDKEnabled(isEnabled);
+
+        mCrashReporting.verify(() -> CrashReporting.setNDKCrashesState(Feature.State.DISABLED));
+    }
 }

test/crash_reporting_test.dart

@@ -83,4 +83,14 @@ void main() {
       ).called(1);
     }
   });
+
+  test('[setNDKEnabled] should call host method', () async {
+    const enabled = true;
+
+    await CrashReporting.setNDKEnabled(enabled);
+
+    verify(
+      mHost.setNDKEnabled(enabled),
+    ).called(1);
+  });
 }