Bug 948591 - Disable testClearPrivateData on Android 2.3

mobile/android/base/tests/robocop.ini

@@ -28,8 +28,8 @@ skip-if = android_version == "10"
 skip-if = android_version == "10"
 [testBrowserSearchVisibility]
 [testClearPrivateData]
-# disabled on x86 only; bug 948591
-skip-if = processor == "x86"
+# disabled on x86 and 2.3; bug 948591
+skip-if = android_version == "10" || processor == "x86"
 [testDistribution]
 [testDoorHanger]
 [testFindInPage]