Added larger hit area for back buttons

Addresses known issue listed in #1.

app/src/main/java/cash/z/ecc/android/ui/detail/WalletDetailFragment.kt

@@ -16,7 +16,7 @@ class WalletDetailFragment : BaseFragment<FragmentDetailBinding>() {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        binding.backButton.onClickNavUp()
+        binding.backButtonHitArea.onClickNavUp()
     }
 }
 

app/src/main/java/cash/z/ecc/android/ui/receive/ReceiveFragment.kt

@@ -41,7 +41,7 @@ class ReceiveFragment : BaseFragment<FragmentReceiveBinding>() {
             text_address_part_7,
             text_address_part_8
         )
-        binding.backButton.onClickNavUp()
+        binding.backButtonHitArea.onClickNavUp()
     }
 
     override fun onAttach(context: Context) {

app/src/main/java/cash/z/ecc/android/ui/send/SendFragment.kt

@@ -16,7 +16,7 @@ class SendFragment : BaseFragment<FragmentSendBinding>() {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        binding.backButton.onClickNavUp()
+        binding.backButtonHitArea.onClickNavUp()
     }
 }
 

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

@@ -4,8 +4,7 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:background="@drawable/background_home"
-    xmlns:tools="http://schemas.android.com/tools">
+    android:background="@drawable/background_home">
 
     <!-- Back Button -->
     <ImageView
@@ -13,21 +12,33 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:tint="@color/text_light"
-        app:srcCompat="@drawable/ic_arrow_back_black_24dp"
-        app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.05"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
         app:layout_constraintVertical_bias="0.065"
-        app:layout_constraintHorizontal_bias="0.05"/>
+        app:srcCompat="@drawable/ic_arrow_back_black_24dp" />
+
+    <View
+        android:id="@+id/back_button_hit_area"
+        android:layout_width="56dp"
+        android:layout_height="56dp"
+        android:clickable="true"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.01"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.045" />
 
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:textColor="@color/text_light"
         android:text="WALLET DETAIL"
-        app:layout_constraintTop_toTopOf="parent"
+        android:textColor="@color/text_light"
         app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"/>
+        app:layout_constraintTop_toTopOf="parent" />
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -28,6 +28,18 @@
             app:layout_constraintVertical_bias="0.065"
             app:layout_constraintHorizontal_bias="0.05"/>
 
+        <View
+            android:id="@+id/back_button_hit_area"
+            android:layout_width="56dp"
+            android:layout_height="56dp"
+            android:clickable="true"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHorizontal_bias="0.01"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintVertical_bias="0.045" />
+
         <!-- Shield Background -->
         <ImageView
             android:id="@+id/image_shield"

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

@@ -21,6 +21,18 @@
         app:layout_constraintVertical_bias="0.065"
         app:layout_constraintHorizontal_bias="0.05"/>
 
+    <View
+        android:id="@+id/back_button_hit_area"
+        android:layout_width="56dp"
+        android:layout_height="56dp"
+        android:clickable="true"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.01"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.045" />
+
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"