Não consegui inserir um print com a situação no mapa.. mas deixo aqui meu log:
07-17 19:46:37.402 6727-6732/br.com.example.admin.agenda I/zygote64: Compiler allocated 8MB to compile void android.widget.TextView.<init>(android.content.Context, android.util.AttributeSet, int, int)
07-17 19:46:37.967 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:38.527 6727-6727/br.com.example.admin.agenda I/Choreographer: Skipped 37 frames! The application may be doing too much work on its main thread.
07-17 19:46:38.591 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:38.636 6727-6727/br.com.example.admin.agenda W/View: dispatchProvideAutofillStructure(): not laid out, ignoring
07-17 19:46:38.752 6727-6727/br.com.example.admin.agenda I/AssistStructure: Flattened final assist data: 3764 bytes, containing 1 windows, 13 views
07-17 19:46:38.918 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:39.048 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:41.050 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:41.095 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:44.539 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:44.928 6727-6765/br.com.example.admin.agenda I/chatty: uid=10085(u0_a85) RenderThread identical 4 lines
07-17 19:46:45.023 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:45.126 6727-6732/br.com.example.admin.agenda I/zygote64: Compiler allocated 6MB to compile void android.view.ViewRootImpl.performTraversals()
07-17 19:46:46.412 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:46.506 6727-6765/br.com.example.admin.agenda I/chatty: uid=10085(u0_a85) RenderThread identical 1 line
07-17 19:46:46.767 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:54.929 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:56.053 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:56.128 6727-6727/br.com.example.admin.agenda I/Choreographer: Skipped 54 frames! The application may be doing too much work on its main thread.
07-17 19:46:56.190 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:56.508 6727-6738/br.com.example.admin.agenda I/zygote64: NativeAllocBackground concurrent copying GC freed 33370(1508KB) AllocSpace objects, 3(60KB) LOS objects, 49% free, 4MB/8MB, paused 28.600ms total 705.444ms
07-17 19:46:56.728 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:56.797 6727-6765/br.com.example.admin.agenda I/chatty: uid=10085(u0_a85) RenderThread identical 1 line
07-17 19:46:57.060 6727-6765/br.com.example.admin.agenda D/EGL_emulation: eglMakeCurrent: 0x7b292b46eac0: ver 2 0 (tinfo 0x7b2937f1bd20)
07-17 19:46:57.159 6727-6738/br.com.example.admin.agenda I/zygote64: NativeAllocBackground concurrent copying GC freed 5384(296KB) AllocSpace objects, 3(60KB) LOS objects, 49% free, 3MB/7MB, paused 5.026ms total 120.951ms
07-17 19:46:57.928 6727-6732/br.com.example.admin.agenda I/zygote64: Do full code cache collection, code=504KB, data=359KB
07-17 19:46:57.937 6727-6732/br.com.example.admin.agenda I/zygote64: After code cache collection, code=360KB, data=206KB
07-17 19:46:58.032 6727-6727/br.com.example.admin.agenda I/Google Maps Android API: Google Play services package version: 12521025
07-17 19:47:00.773 6727-6727/br.com.example.admin.agenda I/System.out: OLA, EU TENHO A COORDENADA DO ALUNO : lucas E SEU VALOR EH: lat/lng: (-22.808451599999998,-43.4335502)
07-17 19:47:01.439 6727-6727/br.com.example.admin.agenda I/System.out: OLA, EU TENHO A COORDENADA DO ALUNO : luiz E SEU VALOR EH: lat/lng: (41.4853545,-7.180871100000001)
07-17 19:47:01.444 6727-6727/br.com.example.admin.agenda I/System.out: APESAR DE MEUS ESFORÇOS FACO APENAS A MARCACAO DO PRIMEIRO ALUNO NO SEU MAPA :(
07-17 19:47:01.452 6727-6727/br.com.example.admin.agenda I/Choreographer: Skipped 164 frames! The application may be doing too much work on its main thread.