Clarify new setRadioPower documentation

There were some questions on how the new IRadio 1.5 setRadioPower
command should be implemented based on vendor feedback. This CL
clarifies this behavior.

Test: manual
Bug: 143683674
Change-Id: If08741f0ea156a5c2656a47e46f7e1f98bf54ec4
diff --git a/current.txt b/current.txt
index fde9d53..edf17fc 100644
--- a/current.txt
+++ b/current.txt
@@ -688,7 +688,7 @@
 77531c8d048f8f8ae532babd0ca86332a865ec9aace1b051226ef2b21123e645 android.hardware.wifi.supplicant@1.3::ISupplicantStaNetwork
 98592d193a717066facf91428426e5abe211e3bd718bc372e29fb944ddbe6e7c android.hardware.wifi.supplicant@1.3::types
 99f5c26b952271d1246c957e1d0271fa39445ee65cc93aa7c187834f98914a33 android.hardware.radio@1.5::types
-7fefa2cc5b3b3be10b5cff5c5dc195385f491d4bf23ca65f9c6b3c30c8753a33 android.hardware.radio@1.5::IRadio
+890ecacaaa6660802bac01bbbe5f16b1eb1d6a3a3f0e5b398be5cec76a5ab673 android.hardware.radio@1.5::IRadio
 e96ae1c3a9c0689002ec2318e9c587f4f607c16a75a3cd38788b77eb91072021 android.hardware.radio@1.5::IRadioIndication
 829d3827eeb5a8f563e80fe627419b3231012fc02bc2e79782ec5e9ad9f799a4 android.hardware.radio@1.5::IRadioResponse
 4c4ce691df02faa28c0729e2a033ec464e1d72699be8bcde4dfb141313dbeba8 android.hardware.radio.config@1.3::types
diff --git a/radio/1.5/IRadio.hal b/radio/1.5/IRadio.hal
index 0b50436..87824e2 100644
--- a/radio/1.5/IRadio.hal
+++ b/radio/1.5/IRadio.hal
@@ -238,7 +238,8 @@
      * 1) Emergency call is completed; or
      * 2) Another setRadioPower_1_5 is issued with forEmergencyCall being false or
      * preferredForEmergencyCall being false; or
-     * 3) Timeout after a long period of time.
+     * 3) Timeout after 30 seconds if dial or emergencyDial is not called.
+     * Once one of these conditions is reached, the modem should move into normal operation.
      *
      * @param serial Serial number of request.
      * @param powerOn To turn on radio -> on = true, to turn off radio -> on = false.