Add core() usage

Author: pnatashap

config/checkstyle/checkstyle.xml

@@ -335,7 +335,7 @@
   </module>
   <module name="RegexpSingleline">
     <property name="severity" value="error" />
-    <property name="format" value="(?&lt;!\.)(css|hasClass|hasAttribute|attr|find|finds)\(" />
+    <property name="format" value="(?&lt;!\.)(css|hasClass|hasAttribute|attr|find|finds)\((?!@|\)|String)" />
     <property name="message" value="core() should be used with these methods" />
     <property name="id" value="CoreMethodsUnused_Error" />
   </module>

jdi-light-mobile/src/main/java/com/epam/jdi/light/mobile/elements/base/MobileAppUIElement.java

@@ -144,10 +144,10 @@ public void dragAndDropTo(int xOffset, int yOffset) {
 
     @Override
     protected boolean enabled() {
-        if (hasAttribute("enabled")) {
+        if (core().hasAttribute("enabled")) {
             return true;
         }
-        if (hasAttribute("disabled")) {
+        if (core().hasAttribute("disabled")) {
             return false;
         }
         return getWebElement().isEnabled();

jdi-light-mobile/src/main/java/com/epam/jdi/light/mobile/elements/base/MobileUIElement.java

@@ -325,10 +325,10 @@ public MapArray<String, String> getAllAttributes() {
 
     @Override
     protected boolean enabled() {
-        if (hasClass("active") || hasAttribute("enabled")) {
+        if (core().hasClass("active") || core().hasAttribute("enabled")) {
             return true;
         }
-        if (hasClass("disabled")) {
+        if (core().hasClass("disabled")) {
             return false;
         }
         return getWebElement().isEnabled();