am compat reset --no-kill shouldn't kill the process

Bug: 179499460
Test: manual test with:
`adb shell am compat reset --no-kill FGS_START_EXCEPTION_CHANGE_ID com.google.android.keep`

Change-Id: I604ff9d04967082e464c721263c6c0695af22c94

core/java/com/android/internal/compat/IPlatformCompat.aidl

@@ -179,9 +179,10 @@ interface IPlatformCompat {
      *
      * @param changeId    the ID of the change that was overridden
      * @param packageName the app package name that was overridden
+     * @return {@code true} if an override existed
      * @throws SecurityException if overriding changes is not permitted
      */
-    void clearOverrideForTest(long changeId, String packageName);
+    boolean clearOverrideForTest(long changeId, String packageName);
 
     /**
      * Enables all compatibility changes that have enabledSinceTargetSdk ==

services/core/java/com/android/server/am/ActivityManagerShellCommand.java

@@ -2984,7 +2984,13 @@ final class ActivityManagerShellCommand extends ShellCommand {
                         pw.println("Reset all changes for " + packageName + " to default value.");
                         return 0;
                     }
-                    if (platformCompat.clearOverride(changeId, packageName)) {
+                    boolean existed;
+                    if (killPackage) {
+                        existed = platformCompat.clearOverride(changeId, packageName);
+                    } else {
+                        existed = platformCompat.clearOverrideForTest(changeId, packageName);
+                    }
+                    if (existed) {
                         pw.println("Reset change " + changeId + " for " + packageName
                                 + " to default value.");
                     } else {

services/core/java/com/android/server/compat/PlatformCompat.java

@@ -211,9 +211,9 @@ public class PlatformCompat extends IPlatformCompat.Stub {
     }
 
     @Override
-    public void clearOverrideForTest(long changeId, String packageName) {
+    public boolean clearOverrideForTest(long changeId, String packageName) {
         checkCompatChangeOverridePermission();
-        mCompatConfig.removeOverride(changeId, packageName);
+        return mCompatConfig.removeOverride(changeId, packageName);
     }
 
     @Override