TimberArgTypes: wrong detection of measureTimeMillis() return type in Kotlin 1.5

After updating to Kotlin 1.5 we receive this lint error, but actually being a false positive.
```
Error: Wrong argument type for formatting argument '#1' in connectingPlaces() took %d ms: conversion is 'd', received Object (argument #2 in method call) [TimberArgTypes]
Timber.d("connectingPlaces() took %d ms", connectingPlaces)
```

Relevant code:
```kotlin
val connectingPlaces = measureTimeMillis {
// ...
}
Timber.d("connectingPlaces() took %d ms", connectingPlaces)
```

Start by reproducing the TimberArgTypes lint error with the Kotlin 1.5 measureTimeMillis example, then inspect the detector's handling of that return type. Done means the valid %d argument is recognized without a false positive while other formatting checks remain intact.

Written by the indexing model from the issue text.