[image_picker] use LocalizedString to fix lint error. (#3349)

diff --git a/packages/image_picker/image_picker/CHANGELOG.md b/packages/image_picker/image_picker/CHANGELOG.md
index 70a1cb2..a1f7608 100644
--- a/packages/image_picker/image_picker/CHANGELOG.md
+++ b/packages/image_picker/image_picker/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.6.7+17
+
+* iOS: fix `User-facing text should use localized string macro` warning.
+
 ## 0.6.7+16
 
 * Update Flutter SDK constraint.
diff --git a/packages/image_picker/image_picker/ios/Classes/FLTImagePickerPlugin.m b/packages/image_picker/image_picker/ios/Classes/FLTImagePickerPlugin.m
index 00fdec2..8d260f3 100644
--- a/packages/image_picker/image_picker/ios/Classes/FLTImagePickerPlugin.m
+++ b/packages/image_picker/image_picker/ios/Classes/FLTImagePickerPlugin.m
@@ -146,10 +146,10 @@
                                                       animated:YES
                                                     completion:nil];
   } else {
-    [[[UIAlertView alloc] initWithTitle:@"Error"
-                                message:@"Camera not available."
+    [[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Error", nil)
+                                message:NSLocalizedString(@"Camera not available.", nil)
                                delegate:nil
-                      cancelButtonTitle:@"OK"
+                      cancelButtonTitle:NSLocalizedString(@"OK", nil)
                       otherButtonTitles:nil] show];
     self.result(nil);
     self.result = nil;
diff --git a/packages/image_picker/image_picker/pubspec.yaml b/packages/image_picker/image_picker/pubspec.yaml
index 4eb16be..7b49725 100755
--- a/packages/image_picker/image_picker/pubspec.yaml
+++ b/packages/image_picker/image_picker/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Flutter plugin for selecting images from the Android and iOS image
   library, and taking new pictures with the camera.
 homepage: https://github.com/flutter/plugins/tree/master/packages/image_picker/image_picker
-version: 0.6.7+16
+version: 0.6.7+17
 
 flutter:
   plugin: