fix: #2268 Wavegen freq btn problem (#2273)

Author: Wishy-S

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

@@ -883,29 +883,29 @@ private void setSeekBar(IndicatorSeekBar seekBar) {
             case FREQUENCY:
                 seekMin = WaveData.FREQ_MIN.getValue();
                 seekMax = WaveData.FREQ_MAX.getValue();
-                numTicks = 100;
+                numTicks = 50;
                 leastCount = 1;
                 break;
 
             case PHASE:
                 seekMin = WaveData.PHASE_MIN.getValue();
                 seekMax = WaveData.PHASE_MAX.getValue();
-                numTicks = 73;
+                numTicks = 50;
                 leastCount = 1;
                 break;
 
             case DUTY:
                 seekMin = WaveData.DUTY_MIN.getValue();
                 seekMax = WaveData.DUTY_MAX.getValue();
-                numTicks = 100;
+                numTicks = 50;
                 leastCount = 1;
                 unit = getString(R.string.unit_percent);
                 break;
 
             default:
                 seekMin = 0;
                 seekMax = 5000;
-                numTicks = 51;
+                numTicks = 50;
                 leastCount = 1;
         }