Added the contentDescription for views and suppressed this lint warning for some views since we are setting the contentDescription for those views in the code.

app/src/main/res/layout/item_download.xml

@@ -20,6 +20,7 @@
       android:layout_gravity="center"
       android:layout_marginEnd="@dimen/favicon_margin_right"
       android:adjustViewBounds="true"
+      android:contentDescription="@string/fav_icon"
       android:minHeight="?android:attr/listPreferredItemHeight"
       android:scaleType="fitCenter"
       android:src="@mipmap/ic_launcher"
@@ -96,6 +97,7 @@
         android:layout_marginEnd="@dimen/stop_horizontal_margin"
         android:layout_weight="0.5"
         android:padding="7dp"
+        tools:ignore="ContentDescription"
         android:minWidth="@dimen/stop_min_width"
         android:minHeight="@dimen/stop_min_height"
         android:src="@drawable/ic_pause_24dp" />
@@ -109,6 +111,7 @@
         android:layout_marginEnd="@dimen/stop_horizontal_margin"
         android:layout_weight="0.5"
         android:padding="7dp"
+        tools:ignore="ContentDescription"
         android:minWidth="@dimen/stop_min_width"
         android:minHeight="@dimen/stop_min_height"
         android:src="@drawable/ic_stop_24dp" />

app/src/main/res/layout/item_intro_1.xml

@@ -3,6 +3,7 @@
   xmlns:app="http://schemas.android.com/apk/res-auto"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
+  xmlns:tools="http://schemas.android.com/tools"
   android:background="?colorSurface"
   android:padding="24dp">
 
@@ -13,6 +14,7 @@
     app:layout_constraintWidth_max="160dp"
     android:scaleType="fitCenter"
     android:src="@drawable/kiwix_icon"
+    tools:ignore="ContentDescription"
     app:layout_constraintBottom_toTopOf="@id/heading"
     app:layout_constraintEnd_toEndOf="parent"
     app:layout_constraintStart_toStartOf="parent"

app/src/main/res/layout/item_library.xml

@@ -24,6 +24,7 @@
       android:adjustViewBounds="true"
       android:scaleType="fitCenter"
       android:src="@mipmap/ic_launcher"
+      android:contentDescription="@string/fav_icon"
       app:layout_constraintBottom_toBottomOf="parent"
       app:layout_constraintStart_toStartOf="parent"
       app:layout_constraintTop_toTopOf="parent"

core/src/main/res/layout/activity_kiwix_error.xml

@@ -73,6 +73,7 @@
     android:layout_marginTop="12dp"
     android:layout_marginEnd="8dp"
     android:src="@mipmap/ic_launcher"
+    android:contentDescription="@string/app_name"
     app:layout_constraintEnd_toEndOf="parent"
     app:layout_constraintHorizontal_bias="0.0"
     app:layout_constraintStart_toStartOf="parent"

core/src/main/res/layout/kiwix_search_widget.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+  xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="@dimen/kiwix_search_widget_layout_id_height"
   android:layout_marginStart="@dimen/kiwix_search_widget_margin"
@@ -14,7 +15,8 @@
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_weight="0.1"
-    android:src="@mipmap/ic_launcher" />
+    android:src="@mipmap/ic_launcher"
+    tools:ignore="ContentDescription" />
 
   <TextView
     android:id="@+id/search_widget_text"
@@ -29,13 +31,15 @@
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_weight="0.1"
-    android:src="@drawable/ic_stars_black_24dp" />
+    android:src="@drawable/ic_stars_black_24dp"
+    tools:ignore="ContentDescription" />
 
   <ImageView
     android:id="@+id/search_widget_mic"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_weight="0.1"
-    android:src="@drawable/ic_mic_black_24dp" />
+    android:src="@drawable/ic_mic_black_24dp"
+    tools:ignore="ContentDescription" />
 
 </LinearLayout>

core/src/main/res/layout/nav_main.xml

@@ -18,11 +18,13 @@
 
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="match_parent"
-  android:layout_height="match_parent">
+  android:layout_height="match_parent"
+  xmlns:tools="http://schemas.android.com/tools">
 
   <ImageView
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:fitsSystemWindows="true"
+    tools:ignore="ContentDescription"
     android:src="@drawable/ic_home_kiwix_banner" />
 </LinearLayout>

core/src/main/res/layout/reader_fragment_content.xml

@@ -111,6 +111,7 @@
       android:src="@drawable/action_find_previous"
       android:visibility="gone"
       app:fabSize="mini"
+      android:contentDescription="@string/pref_back_to_top"
       app:layout_anchor="@id/bottom_toolbar"
       app:layout_dodgeInsetEdges="bottom"
       tools:visibility="visible" />