Add content search type

[tobiasKaminsky]

Successor of #319

Signed-off-by: tobiasKaminsky [email protected]

[nextcloud-android-bot]

Lint

Type	master	PR
Warnings	0	0
Errors	0	0

SpotBugs (new)

Warning Type	Number
Bad practice Warnings	15
Correctness Warnings	39
Internationalization Warnings	6
Malicious code vulnerability Warnings	7
Multithreaded correctness Warnings	3
Performance Warnings	17
Security Warnings	17
Dodgy code Warnings	59
Total	163

SpotBugs (master)

Warning Type	Number
Bad practice Warnings	15
Correctness Warnings	39
Internationalization Warnings	6
Malicious code vulnerability Warnings	7
Multithreaded correctness Warnings	3
Performance Warnings	17
Security Warnings	17
Dodgy code Warnings	59
Total	163

[tobiasKaminsky]

Question is what to do with that? ;-)

[AndyScherzinger]

Question is what to do with that? ;-)

@tobiasKaminsky what would we be using it for?

[nextcloud-android-bot]

IT test failed: https://www.kaminsky.me/nc-dev/library-integrationTests/1253

[tobiasKaminsky]

@tobiasKaminsky what would we be using it for?

We can search then by mimeype, e.g. get all pdf or all videos.
I updated nextcloud/android#4748, so better talk there as it is in the client code.