[IMA SDK] Crash when no WebView is installed

Version

ExoPlayer 2.19.0

More version details

No response

Devices that reproduce the issue

Sony TV: Bravia 4K GB ATV3, Android 8

Devices that do not reproduce the issue

Other Android or AndroidTV devices having WebView installed.

Reproducible in the demo app?

Not tested

Reproduction steps

Play a media with VAST ads

Expected result

The media plays successfully

Actual result

The app crashes with the following stacktrace:

Fatal Exception: android.util.AndroidRuntimeException: android.webkit.WebViewFactory$MissingWebViewPackageException: Failed to load WebView provider: No WebView installed
       at android.webkit.WebViewFactory.getProviderClass(WebViewFactory.java:438)
       at android.webkit.WebViewFactory.getProvider(WebViewFactory.java:211)
       at android.webkit.WebView.getFactory(WebView.java:2467)
       at android.webkit.WebView.ensureProviderCreated(WebView.java:2462)
       at android.webkit.WebView.setOverScrollMode(WebView.java:2527)
       at android.view.View.<init>(View.java:4536)
       at android.view.View.<init>(View.java:4668)
       at android.view.ViewGroup.<init>(ViewGroup.java:597)
       at android.widget.AbsoluteLayout.<init>(AbsoluteLayout.java:55)
       at android.webkit.WebView.<init>(WebView.java:636)
       at android.webkit.WebView.<init>(WebView.java:581)
       at android.webkit.WebView.<init>(WebView.java:564)
       at android.webkit.WebView.<init>(WebView.java:551)
       at android.webkit.WebView.<init>(WebView.java:541)
       at com.google.ads.interactivemedia.v3.internal.aiq.<init>(IMASDK:1)
       at com.google.ads.interactivemedia.v3.api.ImaSdkFactory.createAdsLoader(IMASDK:6)
       at com.google.ads.interactivemedia.v3.api.ImaSdkFactory.createAdsLoader(IMASDK:4)
       at com.google.android.exoplayer2.ext.ima.ImaAdsLoader$DefaultImaFactory.createAdsLoader(ImaAdsLoader.java:784)
       at com.google.android.exoplayer2.ext.ima.AdTagLoader.requestAds(AdTagLoader.java:545)
       at com.google.android.exoplayer2.ext.ima.AdTagLoader.<init>(AdTagLoader.java:281)
       at com.google.android.exoplayer2.ext.ima.ImaAdsLoader.requestAds(ImaAdsLoader.java:478)
       at com.google.android.exoplayer2.ext.ima.ImaAdsLoader.start(ImaAdsLoader.java:566)
       at com.google.android.exoplayer2.source.ads.AdsMediaSource.lambda$prepareSourceInternal$0(AdsMediaSource.java:201)

Media

This crash is reported by Firebase Crashlytics for my app on production, I don't have the associated media but I guess any media having VAST ads will make the app crash on devices having no WebView installed.

Bug Report

• You will email the zip file produced by adb bugreport to android-media-github@google.com after filing this issue.