refactor: toSentenceCase

1. Replace Activity with Context (activities are also Context)
2. Add method that accepts `Resources`
3. Remove repeated code

AnkiDroid/src/main/java/com/ichi2/anki/ui/internationalization/SentenceCase.kt

@@ -16,7 +16,8 @@
 
 package com.ichi2.anki.ui.internationalization
 
-import android.app.Activity
+import android.content.Context
+import android.content.res.Resources
 import androidx.annotation.StringRes
 import androidx.fragment.app.Fragment
 
@@ -29,16 +30,15 @@ import androidx.fragment.app.Fragment
  * "Toggle Suspend".toSentenceCase(R.string.sentence_toggle_suspend) // "Toggle suspend"
  * ```
  */
-fun String.toSentenceCase(activity: Activity, @StringRes resId: Int): String {
-    val resString = activity.getString(resId)
+fun String.toSentenceCase(resources: Resources, @StringRes resId: Int): String {
+    val resString = resources.getString(resId)
     // lowercase both for the comparison: sentence case doesn't mean all words are lowercase
     if (this.lowercase() == resString.lowercase()) return resString
     return this
 }
 
-fun String.toSentenceCase(fragment: Fragment, @StringRes resId: Int): String {
-    val resString = fragment.getString(resId)
-    // lowercase both for the comparison: sentence case doesn't mean all words are lowercase
-    if (this.lowercase() == resString.lowercase()) return resString
-    return this
-}
+fun String.toSentenceCase(context: Context, @StringRes resId: Int): String =
+    toSentenceCase(context.resources, resId)
+
+fun String.toSentenceCase(fragment: Fragment, @StringRes resId: Int): String =
+    toSentenceCase(fragment.resources, resId)