Incompatibility between libcamera 0.4 and later versions

[ONLYA]

AeState and AeStateEnum are in the draft namespace under controls in libcamera version 0.4. Since version 0.5, they are directly under the controls namespace. This creates the incompatibility between the libcamera 0.4 and 0.5 or later. Therefore, I propose to check the version and work with the AeState accordingly.

The lines of proposed changes are:

LCCV/include/libcamera_app.hpp

Lines 229 to 231 in bca9b3d

	auto ae = ctrls.get(libcamera::controls::AeState);
	if (ae)
	aelock = (*ae == libcamera::controls::AeStateSearching);

I will submit a PR for this