Allow multiple calls to `Intents.release()` without matching calls to `init()`

### Description

[1.3.0 release notes ](https://developer.android.com/jetpack/androidx/releases/test#1.3.0)say:
> Allow Intents.release without Intents.init

### Steps to Reproduce

This code
```
Intents.init()
Intents.release()
Intents.release()
```

### Expected Results

Allowed, no error.

### Actual Results

Exception on the second call to `release`:
```
java.lang.IllegalStateException: init() must be called prior to using this method.
at androidx.test.espresso.intent.Checks.checkState(Checks.java:70)
at androidx.test.espresso.intent.Intents.internalRelease(Intents.java:331)
at androidx.test.espresso.intent.Intents.release(Intents.java:142)
```

### AndroidX Test and Android OS Versions

AndroidX Test 1.3.0, API 23

Read androidx.test.espresso.intent.Intents.internalRelease in Intents.java around line 331 and Checks.checkState in Checks.java:70, then reproduce the three-call sequence from the issue. Done means repeated Intents.release() calls after one init() complete without an IllegalStateException.

Scritto dal modello di indicizzazione a partire dal testo della issue.