Match cmMenuFixedController::init and update

[vagnertxr]

Completes and links sora/cm/cm_controller_menu_fixed.cpp.

Depends on Sammi-Husky/BrawlHeaders#66 — init only matches with gfCamera::TransformFlag's bitfields declared over u16, so that the flag accesses are halfword-wide. This PR does not bump the submodule; it needs that one merged first.

init was at 23%. Three things were wrong:

• unkFA.m_flag2 is actually m_rotate; the target ORs 0x40, not 0x04.
• The camera has to be held in a local. Indexing m_cameraManager->m_cameras[0] per statement reloads the manager every time.
• m_rot is written through an 8-byte temporary, not a Vec3f. A Vec3f temporary forces a 32-byte frame in every position it can occupy, while the target's frame is 16.

The flag writes are split deliberately: setting m_flag7 through the mask keeps the original read live, so the following two writes chain off it. With all three written through the mask, mwcc folds (flags|0x82)|0x40 into flags|0xC2 and hoists it above the first store.

update was never written. It is storeDefault() behind the unk8 guard, then init(), then m_transformFlag and the call. Caching m_cameraManager in a local is what keeps the manager in one register across the inlined bodies.

fn_800A69AC is renamed to its mangled name, which follows from the existing virtual void update(float) declaration.

Verified: ninja reports 127 files OK.