fix: #2268 Wavegen freq btn problem

[Wishy-S]

Fixes #2268

Changes:

• Changed numTicks value to 50 in Wavegenerator activity
• Specifically in WaveGeneratorActivity, Line 886,893,900,908 has been changed.

Screen shots for the changes:

2021-10-28.18-23-07.mp4

Checklist:

• I have used resources from strings.xml, dimens.xml and colors.xml without hard-coding any value.
• No modifications done at the end of resource files strings.xml, dimens.xml or colors.xml.
• I have reformatted code and fixed indentation in every file included in this pull request
• My code does not contain any extra lines or extra spaces.
• I have requested reviews from maintainers.

[Wishy-S]

I would really appreciate if you add hacktoberfest-accepted label for this PR
Thank You!

[Wishy-S]

Any idea about how to increase the range for the tick count value as for now it is 0-50 ?

[CloudyPadmal]

I think it's not possible since the latest version changes in the respective library