feat(tooltip): Reducing minimum threshold distance between tooltip and viewport from 32px to 8px.

PiperOrigin-RevId: 342743054

Author: sayris

packages/mdc-tooltip/constants.ts

@@ -33,7 +33,7 @@ enum CssClasses {
 const numbers = {
   BOUNDED_ANCHOR_GAP: 4,
   UNBOUNDED_ANCHOR_GAP: 8,
-  MIN_VIEWPORT_TOOLTIP_THRESHOLD: 32,
+  MIN_VIEWPORT_TOOLTIP_THRESHOLD: 8,
   HIDE_DELAY_MS: 600,
   SHOW_DELAY_MS: 500,
   // LINT.IfChange(tooltip-dimensions)

packages/mdc-tooltip/test/foundation.test.ts

@@ -509,7 +509,7 @@ describe('MDCTooltipFoundation', () => {
     const tooltipSize = {width: 100, height: 30};
 
     const {foundation, mockAdapter} = setUpFoundationTest(MDCTooltipFoundation);
-    mockAdapter.getViewportWidth.and.returnValue(500);
+    mockAdapter.getViewportWidth.and.returnValue(480);
     mockAdapter.getAnchorBoundingRect.and.returnValue(anchorBoundingRect);
     mockAdapter.getTooltipSize.and.returnValue(tooltipSize);
 
@@ -796,7 +796,7 @@ describe('MDCTooltipFoundation', () => {
 
        const {foundation, mockAdapter} =
            setUpFoundationTest(MDCTooltipFoundation);
-       mockAdapter.getViewportHeight.and.returnValue(120);
+       mockAdapter.getViewportHeight.and.returnValue(110);
        mockAdapter.getAnchorBoundingRect.and.returnValue(anchorBoundingRect);
        mockAdapter.getTooltipSize.and.returnValue(tooltipSize);