Replace existing Robolectric test task with functioning one.

This CL does the following:
- Creates a dir for multivalentTests
- Creates symlinks for the dir to keep Android Studio happy
- Moves many files to the multivalentTests dir
- Adjusts gradle and soong build files to use the new dir as part of
their source sets.

Test: ./gradlew :NexusLauncher:testGoogleWithQuickstepDebugUnitTest
Test: atest Launcher3RoboTests
Fix: 316553886
Bug: 316553889
Flag: NA
Change-Id: Iae28fd0c0191b3ecf9bd2950800875950cca2622

tests/src/com/android/launcher3/ui/PortraitLandscapeRunner.java

@@ -1,89 +0,0 @@
-package com.android.launcher3.ui;
-
-import android.util.Log;
-import android.view.Surface;
-
-import com.android.launcher3.tapl.TestHelpers;
-import com.android.launcher3.util.rule.TestStabilityRule;
-
-import org.junit.rules.TestRule;
-import org.junit.runner.Description;
-import org.junit.runners.model.Statement;
-
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-public class PortraitLandscapeRunner implements TestRule {
-    private static final String TAG = "PortraitLandscapeRunner";
-    private AbstractLauncherUiTest mTest;
-
-    // Annotation for tests that need to be run in portrait and landscape modes.
-    @Retention(RetentionPolicy.RUNTIME)
-    @Target(ElementType.METHOD)
-    public @interface PortraitLandscape {
-    }
-
-    public PortraitLandscapeRunner(AbstractLauncherUiTest test) {
-        mTest = test;
-    }
-
-    @Override
-    public Statement apply(Statement base, Description description) {
-        if (!TestHelpers.isInLauncherProcess()
-                || description.getAnnotation(PortraitLandscape.class) == null
-                // If running in presubmit, don't run in both orientations.
-                // It's important to keep presubmits fast even if we will occasionally miss
-                // regressions in presubmit.
-                || TestStabilityRule.isPresubmit()) {
-            return base;
-        }
-
-        return new Statement() {
-            @Override
-            public void evaluate() throws Throwable {
-                try {
-                    mTest.mDevice.pressHome();
-                    mTest.waitForLauncherCondition("Launcher activity wasn't created",
-                            launcher -> launcher != null);
-
-                    mTest.executeOnLauncher(launcher ->
-                            launcher.getRotationHelper().forceAllowRotationForTesting(
-                                    true));
-
-                    evaluateInPortrait();
-                    evaluateInLandscape();
-                } catch (Throwable e) {
-                    Log.e(TAG, "Error", e);
-                    throw e;
-                } finally {
-                    mTest.mDevice.setOrientationNatural();
-                    mTest.executeOnLauncher(launcher ->
-                    {
-                        if (launcher != null) {
-                            launcher.getRotationHelper().forceAllowRotationForTesting(false);
-                        }
-                    });
-                    mTest.mLauncher.setExpectedRotation(Surface.ROTATION_0);
-                }
-            }
-
-            private void evaluateInPortrait() throws Throwable {
-                mTest.mDevice.setOrientationNatural();
-                mTest.mLauncher.setExpectedRotation(Surface.ROTATION_0);
-                AbstractLauncherUiTest.checkDetectedLeaks(mTest.mLauncher, true);
-                base.evaluate();
-                mTest.getDevice().pressHome();
-            }
-
-            private void evaluateInLandscape() throws Throwable {
-                mTest.mDevice.setOrientationLeft();
-                mTest.mLauncher.setExpectedRotation(Surface.ROTATION_90);
-                AbstractLauncherUiTest.checkDetectedLeaks(mTest.mLauncher, true);
-                base.evaluate();
-                mTest.getDevice().pressHome();
-            }
-        };
-    }
-}