EC505 - Add avoid-keep-awake asciidoc and json

ecocode-rules-specifications/src/main/rules/EC505/javascript/EC505.asciidoc

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+:!sectids:
+
+== Why is this an issue?
+
+To avoid draining the battery, an Android device that is left idle quickly falls asleep.
+Hence, keeping the screen on should be avoided, unless it is absolutely necessary.
+
+== Example of non compliant code
+
+```js
+export default function KeepAwakeExample() {
+  useKeepAwake(); // Non compliant
+  return (
+    <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
+      <Text>This screen will never sleep!</Text>
+    </View>
+  );
+}
+```
+
+```js
+_activate = () => {
+    activateKeepAwake(); // Non-compliant
+    alert('Activated!');
+  };
+```

ecocode-rules-specifications/src/main/rules/EC505/javascript/EC505.json

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+{
+    "tags": [
+      "sobriety",
+      "environment",
+      "ecocode",
+      "react-native",
+      "eco-design"
+    ],
+    "compatibleLanguages": [
+      "JAVASCRIPT",
+      "TYPESCRIPT"
+    ]
+  }