* fix: crash at application launch on Android P
Reference: https://developer.android.com/preview/restrictions-non-sdk-interfaces
Android P introduces new restrictions on the use of non-SDK interfaces, whether directly, via reflection, or via JNI. These restrictions are applied whenever an app references a non-SDK interface or attempts to obtain its handle using reflection or JNI.
In particular, remove reflection via Class.getDeclaredField() and fallback default transition to fade transition.
* refactor: create default transition based on SDK version
Create default transition and setup default animations based on SDK version.
This is to avoid reflection via Class.getDeclaredMethod() for Android P where it throws.
* refactor: extract isAndroidP method
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