[MQ] Fix NPE on getDefaultPictureProfileHandleValue

After ag/34015918, calling package without permission will get null
result when calling getDefaultPictureProfile. This will stops apps using
MediaCodec to fetch default picture profile fallback to use global
default picture profile.

Use default profile id saved in mPictureProfileSharedPreference to avoid
permission requirement for general playback apps.

Flag: EXEMPT bug fix
Bug: 426480778
Test: play video content on 3P app and check global default is used
Change-Id: I263441ee52e8a311e7ae27dc084e18b1aabc2d56