Fix activity content overlapping system navigation bar (#558)

Add fitsSystemWindows="true" to all activity root layouts so content
is inset to avoid overlapping the Android navigation bar at the bottom.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: kasnder

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

@@ -2,7 +2,8 @@
 <androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:fitsSystemWindows="true">
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/list"

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

@@ -4,6 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:fitsSystemWindows="true"
     tools:context="net.kollnig.missioncontrol.DetailsActivity">
 
     <com.google.android.material.appbar.AppBarLayout

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

@@ -4,6 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:fitsSystemWindows="true"
     android:background="?android:attr/colorBackground">
 
     <ScrollView

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

@@ -2,7 +2,8 @@
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:fitsSystemWindows="true">
 
     <androidx.viewpager2.widget.ViewPager2
         android:id="@+id/viewPager"

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

@@ -2,7 +2,8 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:fitsSystemWindows="true">
 
     <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar"

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

@@ -2,7 +2,8 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:fitsSystemWindows="true">
 
     <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar"