added a one-step image/video upload flow

[shubhamtewari]

1. a new one step image/video upload flow has been added (open the image chooser, select multiple images/videos and click open), required files have been modified
2. the MobicomAttachmentSelectorActivity has be modified to better seperate and UI and the controlling fucntions
3. The file async task has been improved to be more generic and moved to a seperate file
4. the KmAttachmnetsControllr has been created to seperate the code( refer to point 2) and the functions common between the new flow and the old flow
5. comments have been added where ever i found difficulty in understanding in what the function did (only for the attachment upload parts)

[shubhamtewari]

By takephoto, it means any photo or is it for taken from camera?

it means photo taken from camera

[devashishmamgain]

By takephoto, it means any photo or is it for taken from camera?

it means photo taken from camera

then we can rename fromTakePhoto to fromCamera

[devashishmamgain]

@shubhamtewari please use proper variable names and not a, b, c, d

[shubhamtewari]

changed

[devashishmamgain]

still showing boolean b

[shubhamtewari]

should be changed now

[shubhamtewari]

Sir regarding the fromCamera and fromMultiSelectActivity.

1. The methods processCamera() and processMultiSelectActivity() inside them have if statements that check for permissions from the user. If the permissions aren't present, the statements inside are not executed and instead permission is asked from the user.
2. these permissions are handled in the onRequestPermissionResult() call-back in ConversationActivity.java
3. Inside this call-back, the variables fromCamera and fromMultiSelectActivity are used.
4. they are important and removing them will break the code.

WHY can't they be set to true inside the methods themselves?

• beacause the processCamera() and procesMultiSelectGallery methods are used in other places too, where the setting of these variable to true isnt needed.
• also having them outside is better for understanding since the method logic doesn't require these variables, they are external to the working of those methods