Samples - adds surface memory option to user (#104)

* adding surface mem type as user arg

* adding mem type user arg for all apps

* readme update

* readme updates on all apps

[ROCm/rocdecode commit: 449572f9bf]

projects/rocdecode/samples/videoDecodeMultiFiles/README.md

@@ -38,6 +38,7 @@ outfile output1.yuv [optional]
 z 0 [optional]
 sei 0 [optional]
 crop l,t,r,b [optional]
+m  0 [optional] [0 : OUT_SURFACE_MEM_DEV_INTERNAL/ 1 : OUT_SURFACE_MEM_DEV_COPIED/ 2 : OUT_SURFACE_MEM_HOST_COPIED]
 infile input2.[mp4/mov...] [optional]
 outfile output2.yuv [optional]
 ...