[RN] Remove duplicated font on Android

Copy it from the main fonts directory instead.

android/sdk/build.gradle

         //
 
         def currentFontTask = tasks.create(name: "${buildType.name}CopyFonts", type: Copy) {
+            from("${projectDir}/../../fonts/jitsi.ttf")
             from("${projectDir}/../../node_modules/react-native-vector-icons/Fonts/")
             into("${bundlePath}/assets/fonts")
         }