Implementing all phone contacts Issue #314 fix

[ionicc]

Added a feature to import all contacts in the phone to Olympus app.

[atsakiridis]

@ionicc thanks a lot for your contribution! I just forked your clone and tried it locally but I'm getting a crash when I try to import contacts, can you have a look?

Here's the stack trace:

06-07 14:07:21.531 15752-15752/org.restcomm.android.olympus E/AndroidRuntime: FATAL EXCEPTION: main
Process: org.restcomm.android.olympus, PID: 15752
java.lang.SecurityException: Permission Denial: opening provider com.android.providers.contacts.ContactsProvider2 from ProcessRecord{8eb9b9e 15752:org.restcomm.android.olympus/u0a205} (pid=15752, uid=10205) requires android.permission.READ_CONTACTS or android.permission.WRITE_CONTACTS
	 at android.os.Parcel.readException(Parcel.java:1620)
	 at android.os.Parcel.readException(Parcel.java:1573)
	 at android.app.ActivityManagerProxy.getContentProvider(ActivityManagerNative.java:4241)
	 at android.app.ActivityThread.acquireProvider(ActivityThread.java:6471)
	 at android.app.ContextImpl$ApplicationContentResolver.acquireUnstableProvider(ContextImpl.java:2407)
	 at android.content.ContentResolver.acquireUnstableProvider(ContentResolver.java:1521)
	 at android.content.ContentResolver.query(ContentResolver.java:486)
	 at android.content.ContentResolver.query(ContentResolver.java:445)
	 at org.restcomm.android.olympus.AddUserDialogFragment.importContacts(AddUserDialogFragment.java:181)
	 at org.restcomm.android.olympus.AddUserDialogFragment.access$000(AddUserDialogFragment.java:46)
	 at org.restcomm.android.olympus.AddUserDialogFragment$1.onClick(AddUserDialogFragment.java:150)
	 at android.view.View.performClick(View.java:5714)
	 at android.widget.TextView.performClick(TextView.java:10926)
	 at android.view.View$PerformClick.run(View.java:22589)
	 at android.os.Handler.handleCallback(Handler.java:739)
	 at android.os.Handler.dispatchMessage(Handler.java:95)
	 at android.os.Looper.loop(Looper.java:148)
	 at android.app.ActivityThread.main(ActivityThread.java:7303)
	 at java.lang.reflect.Method.invoke(Native Method)
	 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
	 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

[ionicc]

That's weird because checkPermissions() method is handling the permissions, Check that out. Permissions should be working perfectly