add: launchCamera.js and launchCamera.android.js

When an user installs E.cash on Android they've automatically granted camera permission
since it's included in the manifest, but if they ever revoke the Permission we
need to check and request it again as the image-picker library does not handle this

src/components/AttachmentPicker/index.native.js

@@ -3,7 +3,7 @@
  */
 import React, {Component} from 'react';
 import {Alert, Linking, View} from 'react-native';
-import {launchCamera, launchImageLibrary} from 'react-native-image-picker';
+import {launchImageLibrary} from 'react-native-image-picker';
 import RNDocumentPicker from 'react-native-document-picker';
 import basePropTypes from './AttachmentPickerPropTypes';
 import styles from '../../styles/styles';
@@ -13,6 +13,7 @@ import {Camera, Gallery, Paperclip} from '../Icon/Expensicons';
 import withWindowDimensions, {windowDimensionsPropTypes} from '../withWindowDimensions';
 import withLocalize, {withLocalizePropTypes} from '../withLocalize';
 import compose from '../../libs/compose';
+import launchCamera from './launchCamera';
 
 const propTypes = {
     ...basePropTypes,

src/components/AttachmentPicker/launchCamera.android.js

@@ -0,0 +1,32 @@
+import {PermissionsAndroid} from 'react-native';
+import {launchCamera} from 'react-native-image-picker';
+
+/**
+ * Launching the camera for Android involves checking for permissions
+ * And only then starting the camera
+ * If the user deny permission the callback will be called with an error response
+ * in the same format as the error returned by react-native-image-picker
+ * @param {CameraOptions} options
+ * @param {function} callback - callback called with the result
+ */
+export default function launchCameraAndroid(options, callback) {
+    // Checks current camera permissions and prompts the user in case they aren't granted
+    PermissionsAndroid.request(PermissionsAndroid.PERMISSIONS.CAMERA)
+        .then((permission) => {
+            if (permission !== PermissionsAndroid.RESULTS.GRANTED) {
+                const error = new Error('User did not grant permissions');
+                error.errorCode = 'permission';
+                throw error;
+            }
+
+            launchCamera(options, callback);
+        })
+        .catch((error) => {
+            /* Intercept the permission error as well as any other errors and call the callback
+             * follow the same pattern expected for image picker results */
+            callback({
+                errorMessage: error.message,
+                errorCode: error.errorCode || 'others',
+            });
+        });
+}

src/components/AttachmentPicker/launchCamera.js

@@ -0,0 +1,3 @@
+import {launchCamera} from 'react-native-image-picker';
+
+export default launchCamera;