Ensure textview fields can be copy/pasted (#3707)

The Android libraries have a bug where a TextView can forget that it contains selectable text, can be pasted in to, etc.

See https://issuetracker.google.com/issues/37095917

Fix this with an extension method that toggles the selectable state to re-enable it, and use this on the profile fields when editing an account.

Fixes #3706

app/src/main/java/com/keylesspalace/tusky/adapter/AccountFieldEditAdapter.kt

@@ -22,6 +22,7 @@ import androidx.recyclerview.widget.RecyclerView
 import com.keylesspalace.tusky.databinding.ItemEditFieldBinding
 import com.keylesspalace.tusky.entity.StringField
 import com.keylesspalace.tusky.util.BindingHolder
+import com.keylesspalace.tusky.util.fixTextSelection
 
 class AccountFieldEditAdapter : RecyclerView.Adapter<BindingHolder<ItemEditFieldBinding>>() {
 
@@ -87,6 +88,10 @@ class AccountFieldEditAdapter : RecyclerView.Adapter<BindingHolder<ItemEditField
         holder.binding.accountFieldValueText.doAfterTextChanged { newText ->
             fieldData[holder.bindingAdapterPosition].second = newText.toString()
         }
+
+        // Ensure the textview contents are selectable
+        holder.binding.accountFieldNameText.fixTextSelection()
+        holder.binding.accountFieldValueText.fixTextSelection()
     }
 
     class MutableStringPair(var first: String, var second: String)

app/src/main/java/com/keylesspalace/tusky/util/ViewExtensions.kt

@@ -18,6 +18,7 @@ package com.keylesspalace.tusky.util
 
 import android.util.Log
 import android.view.View
+import android.widget.TextView
 import androidx.recyclerview.widget.RecyclerView
 import androidx.viewpager2.widget.ViewPager2
 
@@ -66,3 +67,14 @@ fun ViewPager2.reduceSwipeSensitivity() {
         Log.w("reduceSwipeSensitivity", e)
     }
 }
+
+/**
+ * TextViews with an ancestor RecyclerView can forget that they are selectable. Toggling
+ * calls to [TextView.setTextIsSelectable] fixes this.
+ *
+ * @see https://issuetracker.google.com/issues/37095917
+ */
+fun TextView.fixTextSelection() {
+    setTextIsSelectable(false)
+    post { setTextIsSelectable(true) }
+}