Try toggle discard again

```
$ DEVICE=android mocha -t 60000 -R spec find-element-specs.js 


  apidemo - find elements -
    mobile find
      ✓ should scroll to an element by text or content desc (1900ms)
      ✓ should find a single element by content-description (932ms)
      ✓ should find a single element by text (1060ms)
    find element(s) methods
      ✓ should find a single element by content-description (4026ms)
      ✓ should find an element by class name (992ms)
      ✓ should find multiple elements by class name (1532ms)
      ✓ should not find an element that doesnt exist (5209ms)
      ✓ should not find multiple elements that doesnt exist (5161ms)
      ✓ should fail on empty locator (1400ms)
      ✓ should find a single element by id (5584ms)
      ✓ should find a single element by string id (1576ms)
      ✓ should find a single element by resource-id (1611ms)
      ✓ should find multiple elements by resource-id (2742ms)
      ✓ should find multiple elements by resource-id even when theres just one (926ms)
    find element(s) from element
      ✓ should find a single element by tag name (1273ms)
      ✓ should find multiple elements by tag name (1511ms)
      ✓ should not find an element that doesnt exist (5798ms)
      ✓ should not find multiple elements that dont exist (6201ms)
    xpath
      ✓ should find element by type (923ms)
      ✓ should find element by text (1035ms)
      ✓ should find element by partial text (381ms)
      ✓ should find the last element (1310ms)
      ✓ should find element by xpath index and child (803ms)
      ✓ should find element by index and embedded desc (5384ms)
    find elements using accessibility id locator strategy
      ✓ should find an element by name (693ms)
      ✓ should return an array of one element if the plural "elements" is used (957ms)
    find elements by -android uiautomator locator strategy
      ✓ should find elements with a boolean argument (5611ms)
      ✓ should find elements without prepending "new UiSelector()" (1851ms)
      ✓ should find elements without prepending "new UiSelector()." (278ms)
      ✓ should find elements without prepending "new " (1432ms)
      ✓ should find an element with an int argument (1243ms)
      ✓ should find an element with a string argument (403ms)
      ✓ should find an element with an overloaded method argument (1484ms)
      ✓ should find an element with a Class<T> method argument (1470ms)
      ✓ should find an element with a long chain of methods (1430ms)
      ✓ should find an element with recursive UiSelectors (1454ms)
      ✓ should not find an element with bad syntax (5157ms)
      ✓ should not find an element with a made up method (5095ms)
      ✓ should not find an element which does not exist (5187ms)
    invalid locator strategy
      ✓ should not accept -ios uiautomation locator strategy (80ms)


  40 passing (2m)
```

/cc @paymand