To reproduce:

1. Open the project, attached by the user (AndroidKeyboardTest.zip)
2. Build and Run the project on the device
3. Touch the Input field to make the keyboard appear
4. Observe that it is only possible to write numbers and a dot even though Input Field should accept all the punctuation

Expected: you should be able to enter not only dot, but asterisk, slashes, colon, semicolon, in other words, all the punctuation symbols

Reproduced in 2017.1.3p3, 2017.2.2p3, 2017.3.2f1, 2017.4.0f1, 2018.1.0f1, 2018.2.0b1

Tested on
Htc HTC Desire 510, OS:4.4.3, CPU:armeabi-v7a, GPU:Adreno (TM) 306, Build:htc/htc_europe/htc_a11ul:4.4.3/KTU84L/407309.7:user/release-keys
Samsung SM T113, OS:4.4.4, CPU:armeabi-v7a, GPU:Mali-400 MP, Build:samsung/goyavewifixx/goyavewifi:4.4.4/KTU84P/T113XXU0APH5:user/release-keys
Google Nexus 5, OS:6.0.1, CPU:armeabi-v7a, GPU:Adreno (TM) 330, Build:google/hammerhead/hammerhead:6.0.1/M4B30Z/3437181:user/release-keys
Vivo Vivo Xplay6, OS:7.1.1, CPU:arm64-v8a, GPU:Adreno (TM) 530, Build:vivo/PD1610/PD1610:7.1.1/NMF26F/compil01241901:user/release-keys