Fix heart rate cts sensor feature test

Fix CTS test failures for the following two cases :
  1) FEATURE_HEART_RATE = true && FEATURE_HEART_RATE_ECG = false
  2) FEATURE_HEART_RATE = false && FEATURE_HEART_RATE_ECG = true

Bug: 18586833
Change-Id: Id4651fbbc37aa32ff0262d5622975ff302365f29
1 file changed