Analysis: Suppress wp activity utils deprecation warns for jetpack src

Warning Message:
- "'showFullScreen(View!): Unit' is deprecated. Deprecated in Java"
- "'setLightStatusBar(Window!, Boolean): Unit' is deprecated.
Deprecated in Java"
- "'setLightNavigationBar(Window!, Boolean): Unit' is deprecated.
Deprecated in Java"

These deprecated warnings are suppressed, that is, instead of being
resolved, since a resolution would require a proper migration.

Explanation: See Javadoc on related 'WPActivityUtils' class methods.

"Use {@link WindowExtensionsKt} instead."

Author: ParaskP7

WordPress/src/jetpack/java/org/wordpress/android/ui/accounts/login/LoginPrologueFragment.kt

@@ -27,6 +27,7 @@ class LoginPrologueFragment : Fragment(R.layout.jetpack_login_prologue_screen) {
         loginPrologueListener = context
     }
 
+    @Suppress("DEPRECATION")
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
@@ -91,6 +92,7 @@ class LoginPrologueFragment : Fragment(R.layout.jetpack_login_prologue_screen) {
         updateSystemBars(showDarkStatusAndNavBarInLightMode = false)
     }
 
+    @Suppress("DEPRECATION")
     private fun updateSystemBars(showDarkStatusAndNavBarInLightMode: Boolean) {
         activity?.let {
             WPActivityUtils.setLightStatusBar(it.window, !showDarkStatusAndNavBarInLightMode)