Remove older themes properties for Android 4

Signed-off-by: Jean-BaptisteC <jeanbaptiste.charron@outlook.fr>

android/app/src/main/res/drawable/back_arrow.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
-    android:src="@drawable/abc_ic_ab_back_mtrl_am_alpha"
-    android:autoMirrored="true">
-</bitmap>

android/app/src/main/res/values/themes-base.xml

@@ -82,10 +82,6 @@
 
     <item name="android:listDivider">@drawable/list_divider</item>
 
-    <!-- if don't override this attribute the app will be crashed on start on Android 4.xx,
-      because on old prelolipop devices vector drawables don't work correctly -->
-    <item name="homeAsUpIndicator">@drawable/back_arrow</item>
-
     <item name="transitPedestrianBackground">@color/black_4</item>
     <item name="transitRulerBackground">@color/black_4</item>
     <item name="transitStepDivider">@drawable/dot_divider</item>
@@ -218,10 +214,6 @@
 
     <item name="android:listDivider">@drawable/list_divider_night</item>
 
-    <!-- if don't override this attribute the app will be crashed on start on Android 4.xx,
-      because on old prelolipop devices vector drawables don't work correctly -->
-    <item name="homeAsUpIndicator">@drawable/back_arrow</item>
-
     <item name="transitPedestrianBackground">@color/white_4</item>
     <item name="transitRulerBackground">@color/white_4</item>
     <item name="transitStepDivider">@drawable/dot_divider_night</item>