Make sure Proguard keeps zygote preload class.

Bug: 127262679
Test: atest ProguardRulesTest
Change-Id: Ib082404e08d98b25fcecbf680afb4af37fe2786b
diff --git a/tools/aapt2/java/ProguardRules_test.cpp b/tools/aapt2/java/ProguardRules_test.cpp
index da24907..559b07a 100644
--- a/tools/aapt2/java/ProguardRules_test.cpp
+++ b/tools/aapt2/java/ProguardRules_test.cpp
@@ -42,6 +42,7 @@
             android:appComponentFactory="com.foo.BarAppComponentFactory"
             android:backupAgent="com.foo.BarBackupAgent"
             android:name="com.foo.BarApplication"
+            android:zygotePreloadName="com.foo.BarZygotePreload"
             >
           <activity android:name="com.foo.BarActivity"/>
           <service android:name="com.foo.BarService"/>
@@ -63,6 +64,7 @@
   EXPECT_THAT(actual, HasSubstr("-keep class com.foo.BarReceiver { <init>(); }"));
   EXPECT_THAT(actual, HasSubstr("-keep class com.foo.BarProvider { <init>(); }"));
   EXPECT_THAT(actual, HasSubstr("-keep class com.foo.BarInstrumentation { <init>(); }"));
+  EXPECT_THAT(actual, HasSubstr("-keep class com.foo.BarZygotePreload { <init>(); }"));
 
   actual = GetKeepSetString(set, /** minimal_rules */ true);
   EXPECT_THAT(actual, HasSubstr("-keep class com.foo.BarAppComponentFactory { <init>(); }"));
@@ -73,6 +75,7 @@
   EXPECT_THAT(actual, HasSubstr("-keep class com.foo.BarReceiver { <init>(); }"));
   EXPECT_THAT(actual, HasSubstr("-keep class com.foo.BarProvider { <init>(); }"));
   EXPECT_THAT(actual, HasSubstr("-keep class com.foo.BarInstrumentation { <init>(); }"));
+  EXPECT_THAT(actual, HasSubstr("-keep class com.foo.BarZygotePreload { <init>(); }"));
 }
 
 TEST(ProguardRulesTest, FragmentNameRuleIsEmitted) {