PAINTROID-556 - New Shapes-2

[chesh-ire]

jira ticket number : PAINTROID-556
Follows the workflow of the jira ticket in adding a set of new shapes .
New shapes added :

1. checkmark
2. speech bubble
3. lightning
4. moon
5. Arrow
6. Cross
   Created class checkdrawable,speechDrawable,lightningDrawable,moonDrawable,ArrowDrawableand CrossDrawable in the Drawable and respective .xml files .

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