Add LDAC playback quality tile

[eggmasonvalue]

Summary

Adds a Quick Settings tile that cycles the playback quality of the active LDAC A2DP device:

• Best effort (adaptive)
• Connection preferred (330 kbps)
• Balanced (660 kbps)
• Audio quality preferred (990 kbps)

This is a clean reimplementation on the current main branch and supersedes #14.

Behavior

• Shows the current quality in both the subtitle and a distinct waveform icon.
• Remains unavailable when no A2DP device is connected or LDAC is not the active codec.
• Observes Bluetooth connection, codec, and global-setting changes.
• Queues a tap while the asynchronous A2DP profile proxy initializes, so the first cold tap is not lost.
• Writes the platform LDAC quality setting and applies the preference to the active LDAC device.
• Preserves the device's existing sample rate, bit depth, channel mode, and codec-specific fields.

Permissions and compatibility

• Supports API 26 and newer.
• Requests BLUETOOTH_CONNECT at runtime on Android 12+.
• Reuses the existing WRITE_SECURE_SETTINGS setup flow.
• Requests a per-device Companion Device Manager association where required on Android 16+.
• Uses resource booleans to gate the tile and association activity by SDK level, addressing the feedback on feat: LDAC bitrate QS tile #14.
• Bluetooth calls are permission-guarded and lint-annotated.

Validation

• :app:assembleDebug
• :app:lintDebug
• :app:assembleRelease (including R8)
• Installed as an in-place upgrade over version 2.0.
• Tested on a Pixel 10 with an active LDAC device.
• Verified repeated cold-process first taps cycle the setting correctly.