Rename "hasActiveCatalystInstance" to "hasActiveReactInstance" for clarification

Summary:
Sometimes ```hasActiveCatalystInstance()``` is used to check if it's safe to access the CatalystInstance, which will still crash in Venice.

Previously we mitigate this by changing ```reactContext.hasActiveCatalystInstance()``` to ```reactContext.hasActiveCatalystInstance() || reactContext.isBridgeless()```.

To solve this for all and good the plan is:
1, Rename ```hasActiveCatalystInstance()``` to ```hasActiveReactInstance()``` so it won't sounds like CatalystInstance-only.
2, Implement hasActiveReactInstance() for Venice. D27343867
3, Remove previous mitigation. D27343952

This diff is the first step, by xbgs there are **58** non-generated callsites of  ```hasActiveCatalystInstance()``` in code base which are all renamed in this diff.

Changelog:
[Android][Changed] - Rename "hasActiveCatalystInstance" to "hasActiveReactInstance"

Reviewed By: mdvacca

Differential Revision: D27335055

fbshipit-source-id: 5b8ff5e09b79a492e910bb8f197e70fa1360bcef

ReactAndroid/src/androidTest/java/com/facebook/react/testing/idledetection/ReactIdleDetectionUtil.java

@@ -79,7 +79,7 @@ public class ReactIdleDetectionUtil {
   }
 
   private static void waitForJSIdle(ReactContext reactContext) {
-    if (!reactContext.hasActiveCatalystInstance()) {
+    if (!reactContext.hasActiveReactInstance()) {
       return;
     }
     final CountDownLatch latch = new CountDownLatch(1);