Add strict_mode: false

As strict mode is in place, the default strict_mode is now set to true. We are encourage teams to write tests in strict_mode to make tests Bivalent (able to run on device and devicelessly)

Flag: NONE
Test: atest Launcher3RoboTests
Bug: 334089788
Change-Id: I4b4f2ef9a21926eef63fcada81355b928bbe2870

tests/Android.bp

@@ -211,4 +211,5 @@ android_robolectric_test {
     ],
     instrumentation_for: "Launcher3",
     upstream: true,
+    strict_mode: false,
 }