fix(android): Fatal Exception: java.lang.OutOfMemoryError (#8061) (#8098)

Crashlytics:
**Async.java line 181**
**org.nativescript.widgets.Async$Image$DownloadImageTask.doInBackground**
```
Fatal Exception: java.lang.OutOfMemoryError: Failed to allocate a 3601932 byte allocation with 970044 free bytes and 947KB until OOM
at dalvik.system.VMRuntime.newNonMovableArray(VMRuntime.java)
at android.graphics.BitmapFactory.nativeDecodeStream(BitmapFactory.java)
at android.graphics.BitmapFactory.decodeStreamInternal(BitmapFactory.java:863)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:839)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:877)
at org.nativescript.widgets.Async$Image$DownloadImageTask.doInBackground(Async.java:181)
at org.nativescript.widgets.Async$Image$4.run(Async.java:157)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at org.nativescript.widgets.Async$PriorityThreadFactory$1.run(Async.java:86)
at java.lang.Thread.run(Thread.java:818)
```

Crashlytics
**Async.java line 473**
**org.nativescript.widgets.Async$Http$RequestResult.readResponseStream**
```
Fatal Exception: java.lang.OutOfMemoryError: Failed to allocate a 3000012 byte allocation with 2043950 free bytes and 1996KB until OOM
       at dalvik.system.VMRuntime.newNonMovableArray(VMRuntime.java)
       at android.graphics.BitmapFactory.nativeDecodeByteArray(BitmapFactory.java)
       at android.graphics.BitmapFactory.decodeByteArray(BitmapFactory.java:744)
       at org.nativescript.widgets.Async$Http$RequestResult.readResponseStream(Async.java:473)
       at org.nativescript.widgets.Async$Http$HttpRequestTask.doInBackground(Async.java:555)
       at org.nativescript.widgets.Async$Http$1.run(Async.java:307)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at org.nativescript.widgets.Async$PriorityThreadFactory$1.run(Async.java:86)
       at java.lang.Thread.run(Thread.java:818)
```

## PR Checklist

- [x] The PR title follows our guidelines: https://github.com/NativeScript/NativeScript/blob/master/CONTRIBUTING.md#commit-messages.
- [x] There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
- [x] You have signed the [CLA](http://www.nativescript.org/cla).
- [x] All existing tests are passing: https://github.com/NativeScript/NativeScript/blob/master/DevelopmentWorkflow.md#running-unit-tests.
- [ ] Tests for the changes are included - https://github.com/NativeScript/NativeScript/blob/master/WritingUnitTests.md.

## What is the current behavior?
Uncaught exception resulting in crash. This was introduced in v6.2.0.

## What is the new behavior?
Additional `catch` block for uncaught exception type `OutOfMemoryError`

Fixes:
https://www.telerik.com/account/support-tickets/view-ticket/1436458

tns-core-modules-widgets/android/widgets/src/main/java/org/nativescript/widgets/Async.java

@@ -180,11 +180,8 @@ public class Async {
                     stream = new java.net.URL(params[0]).openStream();
                     Bitmap bmp = BitmapFactory.decodeStream(stream);
                     return bmp;
-                } catch (MalformedURLException e) {
-                    Log.e(TAG, "Failed to decode stream, MalformedURLException: " + e.getMessage());
-                    return null;
-                } catch (IOException e) {
-                    Log.e(TAG, "Failed to decode stream, IOException: " + e.getMessage());
+                } catch (Throwable t) {
+                    Log.e(TAG, "Failed to decode stream, Throwable: " + t.getMessage());
                     return null;
                 } finally {
                     if (stream != null) {
@@ -472,8 +469,8 @@ public class Async {
                         bitmapOptions.inSampleSize = scale;
                         this.responseAsImage = BitmapFactory.decodeByteArray(responseStream.buf(), 0, responseStream.size(), bitmapOptions);
                     }
-                } catch (Exception e) {
-                    Log.e(TAG, "Failed to decode byte array, Exception: " + e.getMessage());
+                } catch (Throwable t) {
+                    Log.e(TAG, "Failed to decode byte array, Throwable: " + t.getMessage());
                 }
 
                 if (this.responseAsImage == null) {