Added lsa and multisampling code

[SravanChittupalli]

1) Added code to read lsa readings with multisampling 2) changed char_adc1() function name in adc.c and adc.h to characterize_adc1() for better readability

[SravanChittupalli]

@laukik-hase I have included reading adc and multisampling codes in a single file. So in the lsa test code i will just have to call one function. Is this good for readability or is it better to show multisampling in test code?

[laukik-hase]

@SravanChittupalli Rename lsa to line_sensor_array (It's ambiguous to third person). Also, is there any in-built function for multi-sampling?

[SravanChittupalli]

@laukik-hase I'll do the renaming part. I can't find any in-built function for multisampling in idf docs. The logic we are using is from the idf examples and they did not use any function.

[laukik-hase]

@laukik-hase I'll do the renaming part. I can't find any in-built function for multisampling in idf docs. The logic we are using is from the idf examples and they did not use any function.

Cool then. Just update here when its done. Also, after this you should start working on line following ASAP.

[VedantParanjape]

@SravanChittupalli Please do the changes requested by laukik