Uinput command: allow duplicate configuration entries for a type

Make the uinput command more robust by allowing multiple configuration
entries for the same "type" by concatenating the "data".

With this change, the following configuration:

  "configuration": [
    {"type": 100, "data": [1, 3]}  // UI_SET_EVBIT : EV_KEY, EV_ABS
  ]

can also be written as:

  "configuration": [
    {"type": 100, "data": [1]},  // UI_SET_EVBIT : EV_KEY
    {"type": 100, "data": [3]}   // UI_SET_EVBIT : EV_ABS
  ]

Bug: 240493155
Test: atest TouchScreenTest
Change-Id: Id18d42ceba28ac68b02ef12525cd2384c948f9a8