Set strict_mode to true

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)

Ignore-AOSP-First: Due to merge conflicts, will submit in AOSP later after these batch of CLs are merged in git_main
Test: atest MyRoboTests
Bug: 334089788
Change-Id: I3098e2c1ef1b5fd2ee1a98950db5e4f2e8d87d1e
diff --git a/java/robolectric.go b/java/robolectric.go
index 18386c9..039e439 100644
--- a/java/robolectric.go
+++ b/java/robolectric.go
@@ -116,7 +116,7 @@
 
 	if v := String(r.robolectricProperties.Robolectric_prebuilt_version); v != "" {
 		ctx.AddVariationDependencies(nil, libTag, fmt.Sprintf(robolectricPrebuiltLibPattern, v))
-	} else if !proptools.Bool(r.robolectricProperties.Strict_mode) {
+	} else if !proptools.BoolDefault(r.robolectricProperties.Strict_mode, true) {
 		if proptools.Bool(r.robolectricProperties.Upstream) {
 			ctx.AddVariationDependencies(nil, libTag, robolectricCurrentLib+"_upstream")
 		} else {
@@ -124,7 +124,7 @@
 		}
 	}
 
-	if proptools.Bool(r.robolectricProperties.Strict_mode) {
+	if proptools.BoolDefault(r.robolectricProperties.Strict_mode, true) {
 		ctx.AddVariationDependencies(nil, roboRuntimeOnlyTag, robolectricCurrentLib+"_upstream")
 	}