fix: made the phase buttons invisible for Analog Wave 1 and Digital Wave SQR1

[AsCress]

Fixes #2444
Toggles the visibility of the phase buttons to set them to INVISIBLE for Analog Wave 1 and Digital Wave SQR1 as a phase change for these waves isn't supported by our hardware.

Changes

• app/src/main/java/io/pslab/activity/WaveGeneratorActivity.java

Screenshots / Recordings

Here are screenshots showing the screen when Analog Wave 1 and Digital Wave SQR1 are selected.

Checklist:

• No hard coding: I have used resources from strings.xml, dimens.xml and colors.xml without hard coding any value.
• No end of file edits: No modifications done at end of resource files strings.xml, dimens.xml or colors.xml.
• Code reformatting: I have reformatted code and fixed indentation in every file included in this pull request.
• No extra space: My code does not contain any extra lines or extra spaces than the ones that are necessary.