NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference

**Glide Version**:
```
//Glide
def glideVersion = "4.12.0"
implementation "com.github.bumptech.glide:glide:$glideVersion"
implementation "com.github.bumptech.glide:okhttp3-integration:$glideVersion"
kapt "com.github.bumptech.glide:compiler:$glideVersion"
```

**Integration libraries**:
` implementation 'com.squareup.okhttp3:okhttp:4.9.0'`

**Device/Android Version**:
randomly different devices

**Issue details / Repro steps / Use case background**:
not sure that it has any visibly effects

**Stack trace / LogCat**:
```
Glide: Load failed for with size [472x262]
class com.bumptech.glide.load.engine.GlideException: Failed to load resource
There was 1 cause:
java.lang.NullPointerException(Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference)
call GlideException#logRootCauses(String) for more detail
Cause (1 of 1): class com.bumptech.glide.load.engine.GlideException: Failed LoadPath{StringUri->Object->Drawable}, LOCAL
There was 1 cause:
java.lang.NullPointerException(Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference)
call GlideException#logRootCauses(String) for more detail
Cause (1 of 2): class com.bumptech.glide.load.engine.GlideException: Failed DecodePath{StringUri->Drawable->Drawable}
There was 1 cause:
java.lang.NullPointerException(Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference)
call GlideException#logRootCauses(String) for more detail
Cause (1 of 1): class java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
Cause (2 of 2): class com.bumptech.glide.load.engine.GlideException: Failed DecodePath{StringUri->Bitmap->Drawable}
2020-11-03 12:25:03.496 4044-4044//Glide: Root cause (1 of 1)

java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
at com.bumptech.glide.load.resource.drawable.ResourceDrawableDecoder.handles(ResourceDrawableDecoder.java:54)
at com.bumptech.glide.load.resource.drawable.ResourceDrawableDecoder.handles(ResourceDrawableDecoder.java:25)
at com.bumptech.glide.load.engine.DecodePath.decodeResourceWithList(DecodePath.java:90)
at com.bumptech.glide.load.engine.DecodePath.decodeResource(DecodePath.java:70)
at com.bumptech.glide.load.engine.DecodePath.decode(DecodePath.java:59)
at com.bumptech.glide.load.engine.LoadPath.loadWithExceptionList(LoadPath.java:76)
at com.bumptech.glide.load.engine.LoadPath.load(LoadPath.java:57)
at com.bumptech.glide.load.engine.DecodeJob.runLoadPath(DecodeJob.java:524)
at com.bumptech.glide.load.engine.DecodeJob.decodeFromFetcher(DecodeJob.java:488)
at com.bumptech.glide.load.engine.DecodeJob.decodeFromData(DecodeJob.java:474)
at com.bumptech.glide.load.engine.DecodeJob.decodeFromRetrievedData(DecodeJob.java:426)
at com.bumptech.glide.load.engine.DecodeJob.onDataFetcherReady(DecodeJob.java:390)
at com.bumptech.glide.load.engine.SourceGenerator.onDataReadyInternal(SourceGenerator.java:148)
at com.bumptech.glide.load.engine.SourceGenerator$1.onDataReady(SourceGenerator.java:76)
at com.bumptech.glide.load.model.UnitModelLoader$UnitFetcher.loadData(UnitModelLoader.java:55)
at com.bumptech.glide.load.engine.SourceGenerator.startNextLoad(SourceGenerator.java:70)
at com.bumptech.glide.load.engine.SourceGenerator.startNext(SourceGenerator.java:63)
at com.bumptech.glide.load.engine.DecodeJob.runGenerators(DecodeJob.java:310)
at com.bumptech.glide.load.engine.DecodeJob.runWrapped(DecodeJob.java:279)
at com.bumptech.glide.load.engine.DecodeJob.run(DecodeJob.java:234)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:764)
at com.bumptech.glide.load.engine.executor.GlideExecutor$DefaultThreadFactory$1.run(GlideExecutor.java:393)
```