Add image_picker library, refs #10046

Reason: before this commit app crashs in release mode,
there are no settings for this app (in ios settings app).

After adding image_picker library and getImage() function in
lib/common.dart (pre caution against AOT compiller dead code
elemenation) after ask permissions for camera usage.

ios/Flutter/Generated.xcconfig

@@ -1,9 +1,9 @@
 // This is a generated file; do not edit or check into version control.
 FLUTTER_ROOT=/Users/dinect/projects/flutter
 FLUTTER_APPLICATION_PATH=/Users/dinect/projects/checker
-FLUTTER_TARGET=/Users/dinect/projects/checker/lib/main.dart
-FLUTTER_BUILD_MODE=debug
+FLUTTER_TARGET=lib/main.dart
+FLUTTER_BUILD_MODE=release
 FLUTTER_BUILD_DIR=build
 SYMROOT=${SOURCE_ROOT}/../build/ios
-FLUTTER_FRAMEWORK_DIR=/Users/dinect/projects/flutter/bin/cache/artifacts/engine/ios
+FLUTTER_FRAMEWORK_DIR=/Users/dinect/projects/flutter/bin/cache/artifacts/engine/ios-release
 #include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"

ios/Podfile.lock

@@ -3,6 +3,8 @@ PODS:
   - FMDB (2.6.2):
     - FMDB/standard (= 2.6.2)
   - FMDB/standard (2.6.2)
+  - image_picker (0.0.1):
+    - Flutter
   - path_provider (0.0.1):
     - Flutter
   - sqflite (0.0.1):
@@ -10,13 +12,16 @@ PODS:
     - FMDB
 
 DEPENDENCIES:
-  - Flutter (from `/Users/dinect/projects/flutter/bin/cache/artifacts/engine/ios`)
+  - Flutter (from `/Users/dinect/projects/flutter/bin/cache/artifacts/engine/ios-release`)
+  - image_picker (from `/Users/dinect/.pub-cache/hosted/pub.dartlang.org/image_picker-0.1.3/ios`)
   - path_provider (from `/Users/dinect/.pub-cache/hosted/pub.dartlang.org/path_provider-0.2.1+1/ios`)
   - sqflite (from `/Users/dinect/.pub-cache/hosted/pub.dartlang.org/sqflite-0.2.4/ios`)
 
 EXTERNAL SOURCES:
   Flutter:
-    :path: "/Users/dinect/projects/flutter/bin/cache/artifacts/engine/ios"
+    :path: "/Users/dinect/projects/flutter/bin/cache/artifacts/engine/ios-release"
+  image_picker:
+    :path: "/Users/dinect/.pub-cache/hosted/pub.dartlang.org/image_picker-0.1.3/ios"
   path_provider:
     :path: "/Users/dinect/.pub-cache/hosted/pub.dartlang.org/path_provider-0.2.1+1/ios"
   sqflite:
@@ -25,6 +30,7 @@ EXTERNAL SOURCES:
 SPEC CHECKSUMS:
   Flutter: d674e78c937094a75ac71dd77e921e840bea3dbf
   FMDB: 854a0341b4726e53276f2a8996f06f1b80f9259a
+  image_picker: a211f28b95a560433c00f5cd3773f4710a20404d
   path_provider: f96fff6166a8867510d2c25fdcc346327cc4b259
   sqflite: 8e2d9fe1e7cdc95d4d537fc7eb2d23c8dc428e3c