feat: add profiled DualSense PCM haptics experiment

patches/bluepad32-sdl3-imu.patch

@@ -584,3 +584,30 @@ index 67841e8..9fe7134 100644
              d->report_parser.set_lightbar_color = uni_hid_parser_psmove_set_lightbar_color;
              d->report_parser.play_dual_rumble = uni_hid_parser_psmove_play_dual_rumble;
              logi("Device detected as PS Move: 0x%02x\n", type);
+diff --git a/src/components/bluepad32/bt/uni_bt.c b/src/components/bluepad32/bt/uni_bt.c
+--- a/src/components/bluepad32/bt/uni_bt.c
++++ b/src/components/bluepad32/bt/uni_bt.c
+@@ -73,6 +73,12 @@
+ #include "uni_log.h"
+ #include "uni_property.h"
+ 
++#ifdef SWITCH_PICO_HAPTICS_EXPERIMENT
++// The opt-in PCM sender owns its CAN_SEND_NOW event, not the generic HID FIFO.
++extern bool uni_platform_on_l2cap_can_send_now(uni_hid_device_t* device,
++                                              uint16_t local_cid);
++#endif
++
+ // globals
+ bd_addr_t uni_local_bd_addr;
+ 
+@@ -473,6 +479,10 @@ void uni_bt_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t* pack
+                     if (device == NULL) {
+                         loge("--->>> CANNOT FIND DEVICE");
+                     } else {
++#ifdef SWITCH_PICO_HAPTICS_EXPERIMENT
++                        if (uni_platform_on_l2cap_can_send_now(device, local_cid))
++                            break;
++#endif
+                         uni_hid_device_send_queued_reports(device);
+                     }
+                     break;