test: add firmware capture fixtures and stdlib-level unit tests for parsers, intents, running apps

tests/fixtures/media_session_wholphin.txt

@@ -0,0 +1,23 @@
+MEDIA SESSION SERVICE (dumpsys media_session)
+
+ 9 sessions listeners.
+ User Records:
+ Record for full_user=0
+   Media button session is null
+   Sessions Stack - have 1 sessions:
+     Wholphin media session com.github.damontecres.wholphin/Wholphin media session (userId=0)
+       ownerPid=6117, ownerUid=10117, userId=0
+       package=com.github.damontecres.wholphin
+       launchIntent=null
+       mediaButtonReceiver=null
+       active=true
+       flags=3
+       rating type=0
+       controllers: 1
+       state=PlaybackState {state=3, position=17237, buffered position=70070, speed=1.0, updated=1408392, actions=7339995, custom actions=[], active item id=0, error=null}
+       audioAttrs=AudioAttributes: usage=USAGE_MEDIA content=CONTENT_TYPE_MOVIE flags=0x800 tags= bundle=null
+       volumeType=1, controlType=2, max=0, current=0
+       metadata: size=11, description=Twirlywoos, null, null
+       queueTitle=null, size=1
+ Audio playback (lastly played comes first)
+   uid=10117 packages=com.github.damontecres.wholphin