Update git submodules

* Update frameworks/support from branch 'androidx-main'
  to 18a297e93e925e94df63313ece59f61b2736e5c2
  - Merge "Filter microbench simpleperf to caller thread only" into androidx-main
  - Filter microbench simpleperf to caller thread only
    
    Fixes: 217501939
    Test: TrivialKotlinBenchmark, with bg thread added (see below)
    Relnote: "Filter simpleperf sampled profiling to measureRepeated thread only to simplify inspection"
    
    ```
    // in TrivialKotlinBenchmark.kt
        init {
            thread { while (true) {} }
        }
    
    // in benchmark/benchmark/build.gradle
    android {
        defaultConfig {
            testInstrumentationRunnerArgument 'androidx.benchmark.profiling.mode', 'StackSampling'
        }
    }
    ```
    
    Change-Id: Ic3e12bb15660e78b63d23f070c2c5e676e744701