Use our own translation for "OK"

I missed this in the PR that it came with, but I guess it'll be useful if we go multiplatform.

(cherry picked from commit f344831d5877d1d0a7772b00f498ddfb6e86da04)

# Conflicts:
#	app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt

app/src/main/java/exh/pagepreview/components/PagePreviewScreen.kt

@@ -136,7 +136,7 @@ fun PagePreviewPageDialog(
                 onPageSelected(page.roundToInt())
                 onDismissPageDialog()
             },) {
-                Text(stringResource(android.R.string.ok))
+                Text(stringResource(R.string.action_ok))
             }
         },
         dismissButton = {

app/src/main/java/exh/ui/batchadd/BatchAddScreen.kt

@@ -157,7 +157,7 @@ class BatchAddScreen : Screen() {
                 onDismissRequest = onDismissRequest,
                 confirmButton = {
                     TextButton(onClick = onDismissRequest) {
-                        Text(text = stringResource(android.R.string.ok))
+                        Text(text = stringResource(R.string.action_ok))
                     }
                 },
                 title = {

app/src/main/java/exh/ui/intercept/InterceptActivity.kt

@@ -122,7 +122,7 @@ class InterceptActivity : BaseActivity() {
                         MaterialAlertDialogBuilder(this)
                             .setTitle(R.string.chapter_error)
                             .setMessage(getString(R.string.could_not_open_entry, it.reason))
-                            .setPositiveButton(android.R.string.ok, null)
+                            .setPositiveButton(R.string.action_ok, null)
                             .setOnCancelListener { onBackPressed() }
                             .setOnDismissListener { onBackPressed() }
                             .show()